Colt m16A2 upper build

[mrclark303]

Looks great, spot on the same build I am planning when life stops getting in my way and stopping me!

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[RCS]

mrclark, just curious about your selection of the 22 Win Mag cartridge for the AR-15 sub caliber semi auto ? I know the 22 Win Mag is quite expensive
here in the USA plus you do not have the selection available with bullet weights and loadings.

[mrclark303]

mrclark, just curious about your selection of the 22 Win Mag cartridge for the AR-15 sub caliber semi auto ? I know the 22 Win Mag is quite expensive
here in the USA plus you do not have the selection available with bullet weights and loadings.

Basically, because it's the most potent round we are allowed as semi automatic in the UK.

We aren't allowed .17HMR, but are allowed .22 WMR as semi, go figure!

[browningautorifle]

.22 WMR as semi

Quite a potent cartridge, specially in a Ruger 10/22 WMR. Discontinued but still around. Too bad the ammo costs so much, great cartridge.

[RCS]

I do understand now and would do the same kind of conversion. Always interesting to build something new
and have done so - as I always liked the MAT 49, I built an example very close in size but chambered it for the
30M1 carbine cartridge using a muti lug bolt and short recoil. I made the bolt and barrel breech and sent them
to my friend in Colo who had these parts heat treated at a gunsmithing school. I did use a M1 carbine hammer
trigger and sear to save time. Did the test firing at the local Police range with ball cartridges and it worked. Over
time the barrel return parts started to take a beating. Recently, I started to rebuild my original example and it is
now working.

[RCS]

Some old photos from years ago. The breech and bolt are 4140 steel heat treated to 50 Rockwell C scale. I chambered a 1903 barrel in 30 M1 carbine cal and used an M16 extractor, m1 carbine trigger housing parts and made the rest. Have some trouble with soft lead nose bullets feeding, ball works really well

Very simple action, just a bolt and bolt carrier moving back and forth, barrel moves to the rear a short distance while the bolt is rotated out of the barrel collar. Ejection is not violent, empty cases are ejected almost two feet. Wish that I had not welded the muzzle brake to the BAR sight cover

This was an interesting mechanism to build and shoot and have since made some improvements. Important to stamp information as to who made this, serial number and caliber. It is about the same size as the French MAT 49

[mrclark303]

That's a facinating build, excellent work!