Accurizimg my springfield m1a

pujyboy · 07-02-2007, 01:14 AM

I recently purchased a Springfield Armory loaded M1A with the full cluster rail. I have ordered a scope and plan to get it sighted in next weekend if everything gets here in time. I have put about 25 rounds through it getting my iron sights bzo'ed and I really love the way this rifle feels. Recoil was much lighter than I expected, the trigger was a million times smoother than any m16 I've ever used in 4 years in the marine corps, and I had no stoppages of any kind.

Now, if I find next week when shooting on a real range with a scope that my groups aren't as tight as I'd like them to be, I'd like to do some stuff to increase accuracy. I plan to redo the bedding, but I had some other questions regarding match conditioning.

The operating rod can touch the bottom of the barrel slightly if i push the two pieces together. Will this affect my harmonics? It seems like it is an inherent part of the design and cannot be avoided, but maybe there is some secret way to "float" it or something that somebody might know of.

Any tips you can offer would be much appreciated.

Ding · 07-02-2007, 03:08 PM

you can unitize the front band and gas cylinder into a single unit so it free floats the entire barrel assembly..

pujyboy · 07-02-2007, 11:18 PM

Would that be done by means of epoxy, welding, or something else?

Ding · 07-04-2007, 03:41 PM

there's two different methods of unitizing them. I was taught the drill & tap method (& stake) which doesn't reveal any exterior modification (necessary for some competitions). Another method is to weld the unit together

Gas leaves the barrel through a tiny hole in one of the lands. As the piston begins moving rearward, the hole is shut off, limiting the amount of gas that can enter.

Unitizing the system is one of the steps towards accurizing your M1A. For more info, pick up Scott Duff's book on the M1A for starters
Makes the gas cylinder and front handguard band into a single unit that free floats the entire barrel assembly for consistent accuracy. AMU-style, drilled and tapped gas cylinder lets you sling up tightly in any position without sling pressure adversely affecting your point of aim.

07-02-2007, 01:14 AM	#1
pujyboy Registered User Join Date: Jul 2007 Posts: 2	Accurizimg my springfield m1a I recently purchased a Springfield Armory loaded M1A with the full cluster rail. I have ordered a scope and plan to get it sighted in next weekend if everything gets here in time. I have put about 25 rounds through it getting my iron sights bzo'ed and I really love the way this rifle feels. Recoil was much lighter than I expected, the trigger was a million times smoother than any m16 I've ever used in 4 years in the marine corps, and I had no stoppages of any kind. Now, if I find next week when shooting on a real range with a scope that my groups aren't as tight as I'd like them to be, I'd like to do some stuff to increase accuracy. I plan to redo the bedding, but I had some other questions regarding match conditioning. The operating rod can touch the bottom of the barrel slightly if i push the two pieces together. Will this affect my harmonics? It seems like it is an inherent part of the design and cannot be avoided, but maybe there is some secret way to "float" it or something that somebody might know of. Any tips you can offer would be much appreciated.

07-04-2007, 03:41 PM	#4
Ding Member Join Date: Jun 2007 Location: Orygun Posts: 57	there's two different methods of unitizing them. I was taught the drill & tap method (& stake) which doesn't reveal any exterior modification (necessary for some competitions). Another method is to weld the unit together Gas leaves the barrel through a tiny hole in one of the lands. As the piston begins moving rearward, the hole is shut off, limiting the amount of gas that can enter. Unitizing the system is one of the steps towards accurizing your M1A. For more info, pick up Scott Duff's book on the M1A for starters Makes the gas cylinder and front handguard band into a single unit that free floats the entire barrel assembly for consistent accuracy. AMU-style, drilled and tapped gas cylinder lets you sling up tightly in any position without sling pressure adversely affecting your point of aim. Last edited by Ding; 07-04-2007 at 03:46 PM. Reason: Automerged Doublepost

07-02-2007, 03:08 PM	#2
Ding Member Join Date: Jun 2007 Location: Orygun Posts: 57	you can unitize the front band and gas cylinder into a single unit so it free floats the entire barrel assembly..

07-02-2007, 11:18 PM	#3
pujyboy Registered User Join Date: Jul 2007 Posts: 2	Would that be done by means of epoxy, welding, or something else?