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 So my buddy sold me a CMMG 22LR barrel and collar...
NagOrzo15-1  [Member]
2/20/2012 12:20:23 AM
For $60.

He had been hinting to his wife he wanted to get a "22 barrel" for his AR15 and she, not being a gun person, took him literally and got just the barrel off Brownells for his birthday a couple weeks ago.

Being a smart man he didn't say anything to her. Sold me the barrel and we ordered a complete upper on my card.... He got it last week, set it up and showed it off to his better half, and expressed his delight at her thoughtful gift. (That's how you do it fellas...)

Anyway, since I've got a Ciener kit and haven't liked the lack of accuracy from a 1:7 and 1:9 barrel with it, I've decided to build an upper around the barrel.

Picked up a well priced A2 upper (just going to run a plug in the fwd assist), and a clamp on front sight. (I'm afraid I wouldn't index a regular drill-and-pin FSB correctly). I've got some handguards around here, and will have to pick up a flash hider or at least a thread protector for the front of the barrel.

I figure I'll be able to get this thing put together for about $125 to $150, not counting the cost of the Ciener kit and mags –– so its not a huge savings from the cost of a ready-built kit (or just ordering the CMMG upper without a bolt).

Wish me luck.

Brazos_Jack  [Member]
2/20/2012 7:50:03 AM
I've got an MGI modular swap barrel upper. About 5 or 6 years ago I got Spikes to sell me one of their barrels that they used in their uppers and their modified Ciener kit (before they started making their own). That thing is a blast. When I got it, Black Dog just had out their 1st gen skinny mag. They got the feed angle wrong and it would only feed std velocity ammo. But they corrected the feed angle in their 2nd gen full bodied mags so now I can feed it any kind of hi speed or std vel .22lr I want.

I think a dedicated barrel/upper is much better than a kit in a .223 barrel:

correct groove diameter for .22lr - .221 instead of .223
correct rifling twist for .22lr - 1 in 16" instead of 1 in 7" to 1 in 12"
no shaved lead and powder fouling from the .22lr ammo gunking up your 5.56 gas tube
forever4  [Team Member]
2/20/2012 9:47:34 AM
I bought a match set of billet upper and lower from Center Fire Systems a year or two ago on sale. Nice looking, something different. I had a conversion kit in the safe. When CMMG started selling their barrels and collars I jumped on the wagon and figured this all out. One barrel and collar plus one conversion kit plus billet receivers =cool billet .22 dedicated rifle that is my favorite. Not too much money in it either but its not how much you spend that matters, is it?
NagOrzo15-1  [Member]
2/20/2012 1:06:57 PM
Originally Posted By forever4:
I bought a match set of billet upper and lower from Center Fire Systems a year or two ago on sale. Nice looking, something different. I had a conversion kit in the safe. When CMMG started selling their barrels and collars I jumped on the wagon and figured this all out. One barrel and collar plus one conversion kit plus billet receivers =cool billet .22 dedicated rifle that is my favorite. Not too much money in it either but its not how much you spend that matters, is it?


Totally true. Plus, my significant other's son is excited about it... The idea of putting together a rifle from pieces intrigues the young feller. I'm going to have him help me do the whole build and take him to the range for the Upper's first trip out.

VASCAR2  [Member]
2/21/2012 1:13:26 AM
Built an extra 22 upper with a CMMG barrel and collar using parts I had laying around. I liked it so well I got one of the PSA lowers on sale last year, got a RRA NM LPK from Joebob's outfitters and made a complete rifle. I really didn't need it as I already had 3 dedicated 22 AR's but each is a little different.

At least I don't have all those good parts laying around!
NagOrzo15-1  [Member]
3/4/2012 8:57:12 PM
Well, I finished it up.

Photos soon. Very very happy with the build. I wound up drilling and tapping the pin holes on one of my own spare FSB assemblies, as the "clamp on" was too loose around the barrel. Got the tower perfectly straight on the very first try. Next step is to back out one each of the 4 screw bits on each side and lock-tite them in there...

Since I used stuff laying around, the only thing I don't have full satisfaction with is the stock. Its an old "pinned" CAR style stock... I don't have an extra multi position stock. Of course, for me, this thing is sized just right as is... but the kids will need some LOP adjustment I think.

Lots of fun... feels great to have built this thing from the ground up.