Armalite AR-10A .308 Winchester 7.62 NATO Semi-Automatic Rifle

The AR 10A is a member of ArmaLite’s AR 10 family of semi-automatic rifles chambered in .308 / 7.62×51 NATO. It differs from the AR 10B by magazine compatibility: the AR 10A accepts early ArmaLite waffle magazines and PMAG-style magazines, whereas the AR 10B uses proprietary aluminum magazines. The AR 10A and AR 10B share many operating features but are not magazine-compatible with each other.

Technical details:

• Caliber: .308 Winchester / 7.62×51 NATO
• Barrel length: Often 20" on match / Super SASS variants; some tactical versions use shorter (e.g. 16") barrels
• Twist rate: Varies by model, e.g. 1:10 on the Super SASS version
• Action: Semi-automatic, gas-operated with rotating bolt
• Magazine capacity: Commonly 20-round magazines
• Stock / Handguard / Rails: Free-floating or quad-rail handguards are common; adjustable stocks and full-length rails for optics
• Features: Adjustable gas block for suppressor compatibility, match trigger options, chrome-lined barrels in some models

Example: AR 10A Tactical version is listed with a 16" barrel, Magpul STR collapsible stock, Key Mod handguard, ambidextrous safety, flip-up MBUS sights, and a dual-purpose compensator.

Optic included: Prism Monstrum Tactical Optic (NO BAG, BOX, NO MAG INCLUDED) – listing for firearm and scope only.