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The C7 also features the structural strengthening, improved handguards, and longer stock developed for the M16A2. Diemaco changed the trapdoor in the buttstock to make it easier to access and a spacer of 0.5 inches (13 mm) is available to adjust stock length to user preference, along with the addition of hammer-forged barrels.
M16A2: A2 Ribbed S-1-F A2 Yes Yes 5.56 NATO 20 in. A2 1:7 ... Short Triangular: Carbine length triangular handguards; Round: Smooth round rifle handguards ...
The Colt Automatic Rifle or Colt Light Machine Gun is a 5.56 mm NATO, open-bolt, full-automatic-only firearm developed by Colt Defense.It is based on the M16A2/A4, and has a distinctive squared-off handguard, vertical grip, carrying handle and integrated bipod.
Full-length ribbed Fixed A2 A2 A2 Flattop None M16A2-style birdcage flash suppressor Yes Yes Yes S-R-Auto N/A C7A2 C7A2 N/A N/A 508 mm (20.0 in) A2 Profile (1 in 180 mm (7 in) twist) Full-length ribbed Four-position retractable A2 A2 Flattop None M16A2-style birdcage flash suppressor Yes Yes Yes S-R-Auto 750 LSW N/A N/A LSV M/04
After the introduction of the M4 Carbine, it was found that the shorter barrel length of 14.5 inches also harm reliability, as the gas port is located closer to the chamber than the gas port of the standard length M16 rifle: 7.5 inches instead of 13 inches. [252]
The M203A2 is intended for use with the M4 series/M16A4 and now also authorized on the M16A2 rifle as the modular weapon system (MWS). Using standard 12 in (30 cm) barrels, the grenade launcher is intended for use in concert with the Knight's Armament Company M5 RAS. The M5 MWS rail system became authorized in December 2008 for the M16A2 Rifle.
It has a shortened 310 mm (12 in) barrel with adjusted gas piston, upper receiver/handguard Picatinny rail, and right side-folding M4-style retractable stock; [9] it weighs 3.3 kg (7.3 lb), is 880 mm (35 in) long with stock extended and 630 mm (25 in) with stock folded. [5]
U.S. Marines in November 2001 armed with M16A2 rifles equipped with AN/PEQ-2s. The AN/PEQ-2 succeeded the AN/PAQ-4C, which was designed in the early 1990s after the Persian Gulf War. [4] It was widely used by US forces during the War in Afghanistan and the Iraq War. [5] [6] [7]