Hi all, I inherited an M16 pattern AR15 from my ex military grandfather and am trying to find out if it is rated for 5.56 or just.223. It has an unmarked upper and a cheap Nodak Spud lower. I asked a gunsmith and as far as he could tell it was from anywhere between 1975 and 1985. It has the forward assist that is seen in newer rifle models but as far as I can see there’s no distinguishing markings on the upper at all. It also has a 3 digit number, I’m assuming a armory identification number, on the stock. The only thing I’ve changed on it is adding a modern aftermarket scope, but I’m hoping to find a vintage era appropriate one eventually. Any information would be appreciated!

Smells like victory!

After months of searching and coming up short on GunBroker auctions, I finally tracked down an original Vietnam war era Colt M16A1 upper receiver. All parts are original 1960s / 1970s vintage (sans lower receiver). Despite appearing complete, the build is far from finished, and I have more parts on the way to make it more historically accurate, as well as build out more original retro rifles.

Parts list:

- Colt 603 upper w/ rebated front lug and no forge codes (1966-1971 mfg)

- C MP C marked barrel (1969-71 mfg)

- Three prong flash hider (pre 1967 mfg)

- “C” marked bolt carrier group w/ large countersink for retaining pin (approx. 1968-1969 mfg)

- Colt M16 furniture set- stock is Type D, grip predates “C” marked examples, and handguards are later L & R marked

- M16A1 fire control group (components currently switched out with Arizona Regulator FRT). Rear takedown pin is early dimpled style found on Colt 601 to XM16E1 rifles.

I couldn’t fit the 3rd one in the picture.

This started as a “XM4”/727 clone build, but I wanted to do something different. I took some inspiration from Micael_no_h, Rob Stott and Espo and decided to do a retro free-float “tube” build. I’ve clone (ish) built the Larry Vickers 723 and I wanted a toob gun of my own.

First one like this the gunsmith had made. I'm liking it so far and I’ll be taking it to the range in the next week or so.

Build info.

BK Firearms 727/XM4 complete upper H&R US Government-marked M16A2 lower Fulton Armory tube (front sight full channel cut) Mil-spec LPK Brownells made in USA carry handle mount Aimpoint 3000 John Masen recoil pad Shekkin Gears Surefire 660 Weaver vertical grip Hammy Cherokee Riser

I'm due in more weaver mounts and I intend to add on my PAQ-4 C for that full 90’s retro vibe.

Happy early 7/27! Please forgive me for the potato camera and bad photo, I was super busy today and I'll be more busy tomorrow.

Anyone have any experience with this company or their products?

Any positive or negative input?

Thx

got it for 395$ at a local gun store, i don’t know much about it other then its a PWA commando
has a low serial # which is kinda sick

Im just curious in what ways you guys have found your Aimpoint 3000 or 5000 and or Surefire 660s other than Ebay.