Showing posts with label Sniper Rifle. Show all posts
Showing posts with label Sniper Rifle. Show all posts

Wednesday, August 3, 2011

Stealth Recon Scout (SRS) Sniper Rifle

Stealth Recon Scout (SRS) Sniper Rifle
The Stealth Recon Scout (SRS) is bolt-action sniper rifle developed by the American firearm manufacturer Desert Tactical Arms. It was unveiled at the 2008 SHOT Show.

The Stealth Recon Scout is notably unusual in that it is one of the few rifles that has a bullpup bolt-action layout. This gives the rifle a relatively compact design; claimed to be 11 inches (280 mm) shorter than conventional sniper rifles. Because of the bullpup layout, the magazine and bolt are behind the pistol grip, hence the operation is slightly different than most other conventional designs. This layout also shifts more weight to the rear of the rifle; the manufacturer claims that this creates a central balancing point. The sling points are balanced with the centerline of the weapon to ensure it lies flat when slung. The rear support grip cheekrest is optimized with the height of the scope and eye alignment, removing the need for an adjustable cheekpiece. A raised, contoured buttpad helps to seat it more securely into the shooter's shoulder.

The Stealth Recon Scout was originally designed around the .338 Lapua Magnum cartridge, but is also available in three other calibers; .243 Winchester, .308 Winchester, and .300 Winchester Magnum — all of which can be changed in a quick conversion. The .338 variant is fed from a five round box magazine, and uses a 26" (660 mm) match fluted, free floated barrel. While the barrel is standard with a muzzle brake, it can be removed to allow access to a threaded muzzle for the attachment of a suppressor.The rifle is guaranteed to have a standard 0.5 MOA (0.15 mrad) accuracy and uses a 1-6 lbs (4-27 N) adjustable match trigger.

The rifle is constructed of polymer (available in olive drab, tan, or black), aluminum, and steel. The handguard and upper receiver use a Picatinny rail system for attaching accessories such as a bipod or a telescopic sight. The safety can be operated without removing the user's hand from the pistol grip, and the magazine release can be operated with one hand.

Desert Tactical Arms Stealth Recon Scout
Type Sniper rifle
Place of origin United States
Production history
Manufacturer Desert Tactical Arms
Unit cost Chassis $3075
Produced 2008–present
Variants .243, .308 Win (7.62 x 51mm), .300 Win, .338 LM (8.61mm)
Specifications
Weight
  • 11.5 lb (5.2 kg) (.243 Winchester)
  • 11 lb (5.0 kg) (7.62x51 mm)
  • 12 lb (5.4 kg) (.300 Winchester Short Magnum)
  • 12.37 lb (5.6 kg) (.338 Lapua Magnum)
Length
  • 33.5 in (850.9 mm) (.243 Winchester)
  • 31.5 in (800.1 mm) (7.62x51 mm)
  • 35.5 in (901.7 mm) (.300 Winchester Magnum)
  • 37.5 in (952.5 mm) (.338 Lapua Magnum)
Barrel length
  • 24 in (609.6 mm) (.243 Winchester)
  • 22 in (558.8 mm) (7.62x51 mm)
  • 26 in (660.4 mm) (.300 Winchester Magnum)
  • 26 in (660.4 mm) (.338 Lapua Magnum)

Cartridge
  • .243 Winchester
  • 7.62x51 mm (.308 Winchester)
  • .300 Winchester Magnum
  • .338 Lapua Magnum
Action Bolt-action
Feed system
  • 5-round detachable box magazine (.338 Lapua Magnum)
  • 6-round detachable box magazine (.300 Winchester)
  • 7-round detachable box magazine (.243 Winchester, .308 Winchester)
Sights Telescopic sight

Barrett M98B Sniper Rifle

Barrett M98B Sniper Rifle

The Barrett Model 98B o 98 Bravo is ra bolt-action sniper rifle chambered in .338 Lapua Magnum (8.6×70mm or 8.58×70mm) manufactured by Barrett Firearms Manufacturing. The M98B was officially announced in October of 2008, and became available for sale in early 2009, with an MSRP of $4,495.00.

The M98B achieves sub-MOA shot groupings of 0.73 inches (19 mm) at 100 yards (91 m), 1.3 inches (33 mm) at 200 yards (180 m), and 4.05 inches (103 mm) at 800 yards (730 m).

Barrett engineers began designing the M98B in 1997, with a goal of developing a precision tactical .338 Lapua rifle not based on any sporting rifles. The initial semi-auto design, the Model98 was unveiled at the 1998 SHOT Show, but never went into full production. In recent years, Ronnie Barrett's son, Chris, revived the company's interest in the .338 rifle.

Many of the M98B's features are inspired by Stoner's AR-15/M16; the hinged aluminum upper and lower receivers, ergonomic pistol grip and thumb operated safety are all borrowed from Stoner's design. The upper receiver also features a full length (18.125 inches (460.4 mm)) 1913 style Picatinny rail for mounting optics, lasers, etc., and two additional accessory rails are mounted forward of the main rail on each side of the upper.

The M98B also features a fluted medium-heavy 27-inch (690 mm) barrel made of 4150 MIL-B-11595 steel. The barrel is rifled in a six groove, 1:10" right hand twist pattern, and features a two-port muzzle brake threaded on and indexed by a jam nut. The bolt rides in a new "bolt guide" design, consisting of two tubular glass-filled polymer guides which have been infused with Teflon. These guides allow the bolt to travel better, as well as reducing the need for lubrication, and helping to seal the ejection and bolt handle ports from dirt. The bolt head is made of case-hardened 8620 steel, features nine lugs (three sets of three), and is attached to the bolt body with a crosspin. This separate bolt head design allows for simple caliber changes, as well as future pre-headspaced barrel and bolt-head sets.

The lower receiver is forged from 7075 aluminum, can mount any type of AR-15/M-16 pistol grip, and features an ambidextrous magazine latch just forward of the integral trigger guard. Also featured within the lower receiver is the rifle's trigger assembly. The trigger assembly can be removed from the receiver as a single unit, and features adjustment screws for weight (2 to 4 lbs.) and overtravel, as well as a reversible AR-15/M-16 style thumb safety.

The skeletonized buttstock is also integral to the lower receiver, and features a thick Sorbothane buttpad with spacers for pull adjustment, a polymer cheekpiece with 0.75 inches (19 mm) of variable comb height, and an adjustable monopod. The rifle also comes from the factory with a Harris brand S-BR bipod attached to the fore-end.

The M98B was featured both on the cover, and in an article, of the April 2009 issue of American Rifleman magazine.

Barrett M98B
Type Sniper Rifle
Place of origin United States
Production history
Designer Ronnie Barrett
Manufacturer Barrett Firearms Manufacturing
Produced 2008–present
Specifications
Weight 13.5 pounds (6.12 kg) empty, without scope
Length 49.75 inches (126.36 cm)
Barrel length 27 inch (68.58 cm)

Cartridge .338 Lapua Magnum
Caliber .338 Lapua Magnum
Action Bolt action
Muzzle velocity 3,100 Ft/S
Feed system 10-round detachable box magazine

Barrett M107 Sniper Rifle

Barrett M107 Sniper Rifle
The Barrett M107 is a .50 caliber, shoulder fired, semi-automatic sniper rifle. Like its predecessors the rifle is said to have manageable recoil for a weapon of its size owing to the barrel assembly that itself absorbs force, moving inward toward the receiver against large springs with every shot. Additionally the weapon's weight and large muzzle brake also assist in recoil reduction. Various changes were made to the original M82A1 to create the M107, with new features such as a lengthened accessory rail, rear grip, and monopod socket. Barrett has recently been tasked with developing a lightweight version of the M107 under the "Anti-Materiel Sniper Rifle Congressional Program," and has already come up with a scheme to build important component parts such as the receiver frame and muzzle brake out of lighter weight materials.

The Barrett M107, like previous members of the M82 line, is also referred to as the Barrett "Light Fifty." The designation has in many instances supplanted earlier ones, with the M107 being voted one of 2005's Top 10 Military Inventions by the U.S. Army.

Barrett M107CQ

A commercial development of the "new" M107, the M107CQ is specifically designed where the firepower of a .50 caliber rifle is required, but the bulk of the M82/M107 series prevents the weapon from being used. The M107CQ is 9" shorter in overall length (all in the barrel) and 5 pounds lighter than the M107. According to the manufacturer the M107CQ is suitable for use in helicopters, force protection watercraft, tactical scout land vehicles, and as an urban soldier's combat multiplier for close quarter battles.

Barrett M107A1

In Oct 2010, Barrett unofficially reported production of the M107 had ceased; and in January 2011 the company announced its successor, the M107A1 was available for commercial release. Significant enhancements include a reduction in weight of 4 pounds, a new cylindrical titanium muzzle brake and titanium barrel key/recoil buffer system which allows the weapon to operate with a Barrett designed suppressor, and other functional modifications that increase durability and operator utility.

Barret M107
Type Sniper Rifle
Place of origin United States
Service history
In service 2008–present
Production history
Designer Ronnie Barrett
Manufacturer Barrett Firearms Manufacturing
Produced 2010–present
Specifications
Weight 12.9 kg (28.4 lb)
Length 1,448 mm (57.0 in)
Barrel length 737 mm (29.0 in)

Cartridge .50 BMG (12.7x99mm NATO)
Action Recoil-operated, rotating bolt
Muzzle velocity 853 m/s (2,800 ft/s)
Effective range 1,829 m (2,000 yd)
Feed system 10-round detachable box magazine
Sights Fixed front, adjustable rear sight; MIL-STD-1913 rail provided for optics

Savage 110 BA Sniper Rifle

Savage 110 BA Sniper Rifle

The Savage 110 BA is a bolt-action sniper/tactical rifle manufactured by the Savage Arms Company. The rifle is designated with an "LE" code; "Law Enforcement". All 110 BA series rifles are configured with AccuTrigger, matte-blued barreled action, fluted heavy free-floating, muzzle brake, oversized bolt handle, external box magazine (holding 5 - 6 rounds), magpul adjustable stock, adjustable pistol grip, and three swivel studs for sling and bipod mounting.

The Savage 110 BA is similar to the Savage Model 10 rifles (10 BAS-K and 10 BAT/S-K). Whereas the Model 10 rifles are short actions rifles the 110 BA uses a long action.

Savage 110 BA
Type Sniper rifle, Bolt-action rifle
Place of origin United States
Production history
Designed 2009
Manufacturer Savage Arms Company
Unit cost US $2,235.00
Variants Savage 10 BAS-K, Savage Model 10 BAT/S-K
Specifications
Weight (15.75 lb)
Length (50.5 in)
Barrel length (26 in)/ (29.5 in) with muzzle brake

Cartridge .338 Lapua Magnum
.300 Winchester Magnum
Action Bolt-action
Effective range
  • 1,100 metres (1,203 yd) (.300 Winchester Magnum)
  • 1,500 metres (1,640 yd) (.338 Lapua Magnum)
Feed system 5-round external box magazine (.338)/6-round external box magazine (.300)
Sights None but includes a picatinny 18" 6061 T6 rail system.

Savage 110 BA Stock/Grip

The 110 BA comes with a Magpul Industries PRS-G3 stock. The stock is considered a precision Rifle/Sniper stock. The stock includes an adjustable length of pull and an adjustable cheek rest for customization to the operator's requirements. The adjustments are achieved via rotating dials that incrementally move the butt plate and cheek rest respectively back and forth or up and down. The stock features a rubber recoil pad with an aluminum core for reduced fatigue and stainless steel adjustment shafts for corrosion resistance. Molded from nylon reinforced polymer. The stock includes an adapter for sling mounting.

The 110 BA also comes stock with a Heckler & Koch PSG1 style pistol grip. The grip is a target-type grip which contains an adjustable palm shelf. A hex bolt rather than a rotating dial tightens or loosens the palm shelf. Loosening the bolt allows for the palm rest to move up and down to accommodate the shooters hand size. Tightening the bolt locks the rest into a set position that is now customized to the shooters hand size.

Savage 110 BA Sights

The Savage 110 BA rifle is provided with pre-drilled holes for attachment of a Picatinny rail system; which the rifle comes with. The picatinny rail allows for a variety of add-ons. The rail is long enough to mount a scope towards the receiver end and can accommodate such devices as night vision in "front" of the scope. The rail system also has two side mounts for additional devices such as flashlights or laser sighting.

The lack of iron sights is because Savage expects users of this rifle to utilize telescopic sights as opposed to iron sights. Telescopic sights are not only more precise, but a "must" for the extreme long distances that this rifle is capable of achieving. A scope is not included because the choice of a particular scope can be a very personal selection that involves a shooters particular taste, comfort, and opinion which are all subjective. Factors that some shooters use to determine a particular scope are: weight, magnification, size, clarity, and many other features.

Savage 110 BA Trigger

The 110 BA comes with the Savage Arms developed "AccuTrigger". This trigger is intended to give a shooter the flexibility to set trigger pull to individual preference without having to pay a gunsmith to adjust it. The trigger can be adjusted from 6.5 to 26 N (1.5 to 6 lbf). Savage claims that even when adjusted to its lowest setting, the AccuTrigger is completely safe and cannot accidentally discharge during normal use from being jarred or dropped when maintained and adjusted as intended.

Inner workings

The AccuTrigger is designed with what Savage calls "an integrated AccuRelease" system that must be completely depressed or the rifle cannot fire. While pulling the trigger, the AccuRelease is intentionally depressed, which unblocks the sear and allows the rifle to discharge. This feature is claimed as a basis for improvement in accuracy hence the name "accutrigger" a variant of "accurate trigger".

Adjustment

Savage claims adjustment of the AccuTrigger is a simple process. Removal of the stock is necessary where rotation of an adjustment spring is required. This is accomplished utilizing the Savage supplied tool. The AccuTrigger has a single adjustment location and is designed so it cannot be adjusted below the minimum setting. This adjustment feature is yet another example of the built-in customization design of this rifle. Customization allows users to adjust the rifle to their own personal comforts and preferences which can equate to accuracy improvement.

Heavy barrel

The 110 BA includes a fluted heavy barrels that is free-floating which provides high accuracy. Thicker barrels are generally stiffer, and thus deflect less when a force is applied, such as when a forearm touches a barrel. A heavier barrel also tends to vibrate less when fired, thus sending bullets more consistently in the same direction. Their greater weight (within reason) makes it easier to hold the rifle steady. For all of these reasons, heavy barrels are generally more accurate than lighter barrels. The "flutes" are essentially grooves that are cut into the length of the barrel to help it dissipating heat. There are many arguments for and against fluted barrels; but whatever the take Savage decided that fluting this barrel on the 110 BA was a good idea.

Free-floating

A free-floating barrel means that the barrel does not touch the stock that is connected to it except at the very end near the receiver and bolt end; where it is attached. The advantage to this design is that there is less vibration resonance. This means that as bullets are fired down the barrel their energy is usually channeled down the edges of the barrel. If the barrel were touching the stock throughout its entire length the energy traveling down the barrel would be transferred to the stock. This transference of energy to the stock would thus cause resonance which results in prolongation of vibrations by reflection. The effect of this is that the entire rifle tends to vibrate which causes inaccuracy as accuracy is a product of stability and not movement. A barrel that is free-floating thus eliminates these problems.

Muzzle Brake

The 110 BA comes with a 3.5" inch Muzzle brake that is threaded to an industry standard 5/8x24 thread pitch. Savage felt that a muzzle brake was essential in the rifle design as the .338 Lapua Magnum round generates recoil that most shooters find unpleasant. The muzzle brakes bottom gills were filled forcing the expanding gases to channel up and out. This feature would eliminate any "dust cloud" when firing from a prone position which would normally give away a shooters position in a tactical situation. By channeling the expanding gases upward and backward muzzle flip and recoil is reduced by what Savage claims is 35 percent. Project designer Steve Danneker claims the 110 BA has recoil comparable and similar to that of the .308 Winchester round.

Rate of twist

According to project designer Steve Danneker of Savage Arms, the rate of twist for the .338 Lapua Magnum was chosen to be 1 in 9". Most rifles in this calibre use a 1 in 10" twist. A 1 in 9" twist allows a bullet to rotate along its center axis at a faster rate than a 1 in 10". Faster rotation helps stabilize longer bullets at their maximum range. This allows new bullet designs such as the all-copper and Very-low-drag bullet (VLD)-style projectile to remain stable through the very long travel distance. Most bullets are not designed for the extreme ranges provided the .338 design; thus a 1 in 10" twist is adequate.

The rifling rate of twist is:

  • 1 in 9" for all 110 BA .338 models
  • 1 in 10" for all 110 BA .300 models

Savage 110 BA Magazine

Savage utilized the Accuracy International detachable five-round, single stack box magazine for the 110 BA. This magazine box is utilized in their Accuracy International Arctic Warfare sniper rifle but not the same magazine used in the Accuracy International AWM (Arctic Warfare Magnum) model. Utilizing an already existing box magazine facilitates the availability of extra magazines for shooters of 110 BA.

An important note on the 110 BA magazine is that it adheres to the .338 Lapua Magnum cartridges loaded to the C.I.P. (Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) maximum allowed overall length of 93.50 mm (3.681 in). It actually accepts up to a 3.760-inch overall length round, though most factory ammunition doesn’t exceed 3.600 inches. This is an important distinction because some rifles chambered in .338 Lapua Magnum such as the Accuracy International AWM does not adhere to CIP standard and thus does not function properly due to a lack of internal magazine length. The reason for this problem is that the AWSM bolt-action is not specifically designed for the fat and long .338 Lapua Magnum cartridge. Because of this, ammunition manufacturers produce .338 Lapua Magnum cartridges that are loaded short enough (≈ 91.44 mm / 3.600 in) to fit in the AWSM magazines. As long as .338 Lapua Magnum cartridges that will fit in the magazines are used, the AWSM rifles can be used as repeating rifles instead of single shot rifles.

Savage 110 BA Sniper/tactical characteristics

Common traits among sniper/tactical rifles of which are included with the design of this rifle are:

  • Adjustable Trigger
  • Adjustable butt plate
  • Adjustable cheek pad
  • Target-type pistol grip with adjustable palm shelf
  • Adjustable rail for bipod
  • Muzzle Brake for less recoil
  • Heavy fluted barrel for accuracy and increased heat dissipation
  • Free-floating barrel for accuracy

This rifle is considered a long range sniper rifle. This rifle shoots a sub-MOA out of the box using heavy match ammunition. As with most modern sniper rifles it includes tight building tolerances thus ensuring the rifles are not affected by such external forces, such as heat, moisture, and vibration which may reduce accuracy. The tolerances of this rifle are such that the receiver and bolt are specifically manufactured for each other. Both have the same serial numbers etched on them in order to match each other correctly . The bolt is NOT interchangeable with other rifles even within the same model. This information is printed on a plastic warning label that protects the disassembled bolt which is part of the shipping box from Savage.

The caliber of choice for most Sniping applications is the .338 Lapua Magnum. The ballistics of this round are superior at longer distances than the other caliber offered for this rifle, the .300 Winchester.

EXACTO EXtreme ACcuracy Tasked Ordinance

EXACTO EXtreme ACcuracy Tasked Ordinance

EXACTO, an acronym of EXtreme ACcuracy Tasked Ordinance, is a sniper rifle being developed for DARPA (Defense Advanced Research Projects Agency) by Lockheed Martin and Teledyne Scientific & Imaging in November 2008.

The new .50 BMG gun and improved scope could employ "fire-and-forget" technologies including "fin-stabilized projectiles, spin-stabilized projectiles, internal and/or external aero-actuation control methods, projectile guidance technologies, tamper proofing, small stable power supplies, and advanced sighting, optical resolution and clarity technologies." Its estimated availability is 2015.

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