CMP for my AR?

CMP is all about service rifles. 4.5# trigger and 4.5x max optics. Sling attached while standing. Otherwise your rifle seems OK if those things apply, or can be made to do so. I know the RRA triggers aren't readily adjustable.

https://thecmp.org/wp-content/uploads/Rulebook.pdf

I believe NRA has a “AROS” class - Any Rifle Optical Site

Shot prone along with the Sling Shooters

For NRA matches only, not CMP. Check out 3.3

http://rulebooks.nra.org/documents/pdf/compete/rules/rul_hpr_17.pdf

NRA High Power is changing service rifle rules due to the use of the M4. Optics are allowed but there are power limits. Sorry to say I shoot service rifle the A2 style with irons so I haven't paid real good attention to the changes to be knowledgeable. I don't know what the CMP is doing. I shoot the John C. Garand matches with them. Rules have been relaxed here a little too.

White Oak Arms has a line on a scope designed for the new rules but man, that thing is expensive. Not WOA fault though these are good guys and AR parts are reasonable for the quality.

We’re seeing more rule changes for allowed equip in the last handful of years than the last couple decades before it.

Last season was:

optics under 4.5x
Triggers over 4.5#
No adjustable gas blocks
Pic rails at least half length of rail at 3, 6, 9, and 12
Nothing over 20”

The only thing I can say, whatever you build today won’t likely be at the forefront of the rules in a season or two, and the NRA HP and CMP rules are just disparate enough to ALMOST make two rifles necessary if you’re going to swap between the two. For most folks, both aren’t available locally, so jumping into the one nearest you, and building a suitable rifle makes the most sense.

The NRA Highpower AR15/M16 service rifle rules are pretty much the same as the CMP rules, to the extent that you can use the same rifle for both. There certainly have been a ton of equipment changes in the last couple of years which I think have been a welcome change. Its slightly spiced up a dying sport.

@Laphroaig is correct in saying the same rifle can be used in boht - which is to say, if a guy uses a model which is outdated by the standards of either sanctioning body, then yes, a shooter can build a rifle which satisfies the requirements of either. If you're riding the line for the rulebook in either, it's two rifles, and probably will be modified next season...

I don't see it that way.

To me, the M16/AR15 Service rifle rules describe exactly the same weapon.

CMP specifically does not allow adjustable gas blocks, whereas NRA specifies the gas system must "adhere to the original M-16 rifle design". Piston gas systems allowed in both.

CMP specifies 20" max barrel length, not to exceed 21 1/4 " including the flash suppressor, NRA just specifies 20" barrel.

Both allow adjustable stocks and extended bolt releases. As previously mentioned, same trigger weights and optic specs.

Tensions between the 2 governing bodies haven't reached the depth where they can't agree on the definition of a service rifle. As for next year, we'll just have to wait and see.

bric2000 said:

Oops, just noticed Highpower is metallic sights.
Is there some type of competition that people use AR platform with scope? I am guessing F-class or Benchrest.
Silhouette?

Click to expand...

IMO you shouldn't choose the type of match you will compete in by the rifle you now have. Choose the discipline that you think you will like most and then adapt your equipment to the rules.

You should like what you're doing first, then work at being good at it.