Clamp-on gas block?
- Thread starter dan1775
- Start date
Register to hide this ad
CrazyFingers
Member
If someone made that, I imagine half this forum would be beating their door down to get one.
CORNfedREBEL
Member
- Joined
- Jan 26, 2011
- Messages
- 42
- Reaction score
- 0
They have to be available, i am looking for a gas block like the ones that come on some of the mp's. i have an x so i will be mounting troy folding sight on the block. if anyone can give me some info on this please let me know
Last edited:
CPTBeaker
Member
Not for the 15-22. The 15-22's barrel is not a standard AR diameter. Any gas block made for an AR will need to be shimmed.
The 15-22 barrel is 0.669" and the standard profile AR barrel is 0.75". I cut a piece of 0.032" brass stock and bent it to use it as a shim on mine, but the gas block is lower than the plane of the receiver rail. The same-plane gas blocks are considerably more than the $23.99 I paid for my 4 rail gas block.
Cornfedrebel- If you don't already have the Troy flip up sight, you can order one for a gas block and it will be the right height. I'm still playing around to find the best solution for mine.
Cornfedrebel- If you don't already have the Troy flip up sight, you can order one for a gas block and it will be the right height. I'm still playing around to find the best solution for mine.
Bitbyte
Member
I've been wondering if the front sight from the colt m4 ops .22lr would fit. Im pretty sure I saw pictures of the m4 next to a 15-22 on the picture thread. Can anyone mic out the diameter on the m4 barrel?
I searched on google for quite awhile and didn't find the info anywhere.
I searched on google for quite awhile and didn't find the info anywhere.
Brett248Vista
Member
If the Colt Ops uses an air soft barrel shroud like I suspect it does... It's .750 because Airsoft AR's use standard A2 sight posts.. 
Bitbyte
Member
Car parts stores sell brass shim stock in varying thicknesses. Cheap, easy, requires no machining and won't mar the barrel.
I'd still prefer one that didn't need shimming tho.
I'd still prefer one that didn't need shimming tho.
tacticool22
US Veteran
The Colt M4 .22LR and H&K .22LR series barrel diameter is less than .750 by .005 to .010 so you can probably assume the diameter where the front sight post attaches is .750.
Installed my A2 sight block on the barrel tonight. Took me about an hour to do it....and that was figuring out exactly how to accomplish it.
turned out to be super easy!
I bought 1 foot of .750 (.035" wall thickness) DOM steel tubing. I cut 2 pieces to fit into the bores of the clamp on sight base.....a little less than 1/2" wide. then, I took an angle grinder and cut a slit into these new bushings. finally, cleaned up the bushings with a quick sanding and then inserted them into the sight base......slid the sight onto the barrel, and tightened the allen bolts! done!!!!
the whole conversion was about $100:
tacticool22 barrel nut adapter..... $22.00
AR15 Delta ring assembly with barrel nut, m4 handguards, and front handguard ring........................ $21.00
Armalite .750" ClampOn sight base.....$45.00
1 foot .750 DOM tubing........$2.50
turned out to be super easy!
I bought 1 foot of .750 (.035" wall thickness) DOM steel tubing. I cut 2 pieces to fit into the bores of the clamp on sight base.....a little less than 1/2" wide. then, I took an angle grinder and cut a slit into these new bushings. finally, cleaned up the bushings with a quick sanding and then inserted them into the sight base......slid the sight onto the barrel, and tightened the allen bolts! done!!!!
the whole conversion was about $100:
tacticool22 barrel nut adapter..... $22.00
AR15 Delta ring assembly with barrel nut, m4 handguards, and front handguard ring........................ $21.00
Armalite .750" ClampOn sight base.....$45.00
1 foot .750 DOM tubing........$2.50
Last edited by a moderator:
tacticool22
US Veteran
Very nice. The final product looks super clean. All it took was wanting to have a certain look and some ingenuity. Now everybody can copy this.
thanks man. It's all possible because of your barrel nut adapter!
GeoffSFAs10
Member
Check off-road shops and racing shops. they should be able to get you DOM, they build cages out of it
Brett248Vista
Member
I already have the spacers thanks to Belt_Fed but I was going to use a pin on A2 post, now that I see this clamp on post I may just go that route, much easier than having to counter bore my barrel for a set screw!
race car chassis shops would have dom or chromoly tubing , but not likely thin wall .750" tubing! that's too small for race cars.
I picked it up a local metal supply shop. DOM stands for "drawn over mandrel" so the tubing is seamless! that's important for a nice fit on the barrel. also, the DOM tubing is nice and polished on the inside from the drawing process. (looks like a skeet barrel for a shotgun.)
PainterlyShotgroup
Member
- Joined
- Jan 29, 2011
- Messages
- 633
- Reaction score
- 263
Installed my A2 sight block on the barrel tonight. Took me about an hour to do it....and that was figuring out exactly how to accomplish it.
turned out to be super easy!
I bought 1 foot of .750 (.035" wall thickness) DOM steel tubing. I cut 2 pieces to fit into the bores of the clamp on sight base.....a little less than 1/2" wide. then, I took an angle grinder and cut a slit into these new bushings. finally, cleaned up the bushings with a quick sanding and then inserted them into the sight base......slid the sight onto the barrel, and tightened the allen bolts! done!!!!
the whole conversion was about $100:
tacticool22 barrel nut adapter..... $22.00
AR15 Delta ring assembly with barrel nut, m4 handguards, and front handguard ring........................ $21.00
Armalite .750" ClampOn sight base.....$45.00
1 foot .750 DOM tubing........$2.50
WOW! that looks really good! I'd like to see the gun completely assembled. Man I used to really like the rails on the 15-22, but for some reason seeing your mod with the front post and M4 hand guard makes it look all the more like an AR. Nice job, I might just have to follow suit...
