利用者:砂男/偵察狙撃用ライフル（仮称）
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偵察狙撃用ライフルは、アメリカ海軍洋上戦闘センターによって、「SEALsのスナイパーに標準のM4カービンよりも大きな威力を持つ、軽量で精度の高い武器を提供する」というコンセプトのもと開発された。 偵察狙撃用ライフルは「RECEEライフル」と呼ばれることもある。 このライフルの生産がNSWCクレーンに委託されたとき、資金とコンセプトが明らかにプログラムに組み込まれていた（正確な出来事については定かではない）。The SEAL Teams were apparently disappointed with the performance of the resulting Mk 12 Special Purpose Rifle (SPR), and convinced the program managers at Crane to return to the original specifications. Production of Recon rifle on the original pattern is progressing now according to several sources.[要出典]
Specifications
[編集]The SEAL Recon Rifle was initially built in-house with the only specifications being the ability to shoot any 5.56×45mm cartridge in inventory (at the time this included the first iterations of the 77-grain (5 g) Mk 262 Mod 0 cartridge), and that the rifle have a barrel 16 inches (406 mm) in length.[1]
The barrel blanks have a 1:8 in (203 mm) twist and are stainless steel[2] with a unique heavy barrel profile, starting with 0.980 in (25 mm) in diameter for the first 2.60 in (66 mm) of length, then narrowing down to 0.850 (22 mm) in diameter, 0.750 in (19 mm) in diameter underneath the front sight block, and 0.725 in (18 mm) in diameter to the muzzle. The barrels have the Ops Inc 12th model suppressors with the specified muzzle brake to mount the suppressor. A carbine-length gas system is used. These barrels were mated to flat top upper receivers, and back up iron sights (BUIS) from KAC (Knight's Armament Company).
Beyond this, exact specifications vary. Since they were built in house, they seem to have been accessorized to personal preferences, with fixed (A1 and A2 styles) and retractable butt-stocks. (Original 4-point and improved 6-point Colt stocks, and the Crane/SOCOM/LMT stock are all in use.) Recon rifles built by Crane are reportedly all fitted with a free-float handguard system, the most popular being the Knight's Armament Co. M4 Match RAS and the LaRue free-float handguards in the longer lengths (which protect the barrel and provide more area to mount tactical accessories). Some operators reportedly use various back-up iron sights (BUISs) by Knight's, ARMS Inc, and Troy Industries, while others do not. The range of optics used on Recon rifles is wide, with various models by Trijicon (like ACOG TA01, TA31F), Leupold (TS-30A1, TS-30A2), and NightForce in use.[2]
See also
[編集]References
[編集]- ^ Rottman, Gordon (20 December 2011). The M16. Osprey Publishing. pp. 46–47. ISBN 978-1-84908-891-6
- ^ a b Neville, Leigh (31 March 2016). Guns of Special Forces 2001 – 2015. Pen and Sword. p. 162. ISBN 978-1-4738-8102-0
- “Lilja M4-Navy Barrel Profile Blueprint”. Template:Cite webの呼び出しエラー：引数 accessdate は必須です。
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