It installs just like the mil-spec unit, but thatвЂ™s where the similarity ends. The Geissele is wire-EDM cut from S7 tool steel and given a black oxide finish with polished, butter-smooth contact points. With its crisp, consistent, 3.5-pound break, it doesnвЂ™t cheat the rifle of its accuracy potential like a stock military trigger does. First on my list was an excellent Geissele Single Stage Precision (SSP) M4 Curved Bow trigger. I wanted to build my own Model 601 with some modern enhancements that wouldnвЂ™t detract from its old-school look. Brownells also has a big selection of standard AR parts like lower kits, sights, headspace gauges and tools useful for any build. And if you canвЂ™t stand the color, you can just paint the furniture. The Retro stock, made from molded Zytel, may not be a perfect match, but itвЂ™s much stronger and will wear better. TheyвЂ™re brighter than the dark olive drab paint applied to the brown fiberglass originals. I am sure a purist will criticize the companyвЂ™s USAF green stocks, grips and handguards. Brownells nailed the overall impression, but there are differences in the small details like the texturing on the magazine release button, the center holes in the heads of various pins, the metal and furniture finishes, and the receiver marking-or lack thereof. The new Brownells Retro parts are overall quite authentically rendered, but neither the parts nor the complete guns are meant to be exact copies of the originals.

Brownells had some color consistency problems with the gray anodizing initially, but by the time you read this, that problem will be solved. I chose the gray anodized receivers because the original black rifle wasnвЂ™t really black at all. For this build project, Brownells was the source for all $648 of the newly manufactured early Model 601 parts, including the gray upper and lower receivers ($150 each), triangular charging handle ($60), early duckbill flash suppressor ($29), green furniture ($80), chromed bolt carrier group without serrations since the 601 had no forward assist ($150), non-captive and easily lost front pivot pin ($15) and aluminum 20-round magazine ($14).

Ar15 retro m16a1 build parts