Step into the Wayback Machine and go back to the beginning of the AR-15 with our BRN-PROTO® - a faithful replica of the Eugene Stoner's very first AR-15 prototype. If you're an AR-15 aficionado or collector, the BRN-PROTO® is a rifle you should not be without! Based on AR-15 Serial Number One, the Brownells' BRN-PROTO® sports a wealth of unique, historically-accurate features you will not see on later AR-15 / M16 models.
First, the BRN-PROTO® has the distinctive trigger-like charging handle on top of the receiver, under the carry handle, just like the early AR-10 models (remember, the AR-15 was developed second.). It has the uncluttered “slick-side” upper receiver of the early rifles and stock, handguard, and pistol grip of brown reinforced polymer that replicates the look - but not the weaknesses - of the original fiberglass furniture. If the round cross-section handguard looks oversized, that's because it is. Just as the original was a "borrowed" AR-10 'guard, it's actually lifted from our BRN-10 .308 rifles!
The BRN-PROTO AR-15 gives you the looks and functionality of the original without the drawbacks. It is constructed of the latest materials using the latest manufacturing techniques, so you have an robust rifle that's ready to put a LOT of rounds down range. Internal dimensions conform to modern "mil-spec" standards, so the BRN-PROTO® is compatible with off-the-shelf upgrade and replacement parts.
Own the BRN-PROTO® rifle from Brownells.
5.56 mm NATO
Anodized Matte Gray
Duckbill Flash Hider
Lower Receiver: The BRN-PROTO® uses the BRN-601 slabside lower receiver with matte gray anodizing.
Upper Receiver: The matte gray anodized upper is slickside, without a forward assist or shell deflector.
Note: The lower features a faux buffer tube retaining roll pin
Charging Handle: The BRN-PROTO® has the distinctive trigger-style charging handle in the top of the receiver, under the carry handle, just like the first AR-15 prototypes.
Front Sight Base & Handguards: The front sight base mirrors that found on AR-15 Serial No. 1. The handguards are the same as used on the BRN-10A, just like the first AR-15 borrowed handguards from the earlier AR-10.
Flash Hider: Original style duckbill 3-prong flash hider installed with split washer, just like the first rifles.
Sights: M16A1 rear and front sights.
Bolt Carrier Group: Chrome M16 bolt carrier assembly. 9310 tool steel bolt is particle inspected and test fired with 10 rounds. 8620 steel carrier, with gas key screws properly torqued & staked.
Magazine: Comes with original-style 25-round magazine, exclusive to Brownells.
Pistol Grip: Brownells M16A1 brown pistol grip.
Manual: A reprint of "The M16A1 Rifle: Operation & Preventative Maintenance," the famous comic-book-style Army manual by cartoonist and graphic artist Will Eisner. First issued in 1969.
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