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Posted: 10/26/2004 7:57:51 AM EST
[Last Edit: 10/26/2004 7:59:37 AM EST by Mustang50]
altho not new to the AR world I am unfamiliar with the SPR concept. Is the SPR a variant in use by our military ? What does an official SPR look like ? I have seen some pics of "SPR's" here in the forum but they seem to vary quite a bit in form. Also many of these pics show a collar type device on the barrel between the front sight and the flash hider/muzzle break. what is the purppose of the collar? Thanx for the info.
Link Posted: 10/26/2004 8:19:02 AM EST
[Last Edit: 10/26/2004 8:20:17 AM EST by Dave_A]

Originally Posted By Mustang50:
altho not new to the AR world I am unfamiliar with the SPR concept. Is the SPR a variant in use by our military ? What does an official SPR look like ? I have seen some pics of "SPR's" here in the forum but they seem to vary quite a bit in form. Also many of these pics show a collar type device on the barrel between the front sight and the flash hider/muzzle break. what is the purppose of the collar? Thanx for the info.



The SPR is an AR-based rifle fielded in certain situations by the US Army, kind of like a NRA 'Space Gun' match weapon, but set up for military purposes (eg as a semi-auto sniper rifle)....

It has an 18" stainless steel free floated heavy barrel, rail system, a flat top upper, and a special muzzle break made by OPS Inc that is designed to accept a supressor made by the same company... They are allways equipped with some sort of optic, and generally have a Harris-type bipod. The gun is designed to be used with 77gr OTM ammunition (Mk262)...

The USMC has a similar-but-different concept they call SAM-R (kind of like the similar-but-different bolt-action sniper weapons (M-24 vs (whatever that gun is the USMC builds from a Remmy 700 action))...
Link Posted: 10/26/2004 8:26:46 AM EST
[Last Edit: 10/26/2004 8:28:37 AM EST by Mustang50]
Thanks for the skinny Dave_A now i feel a bit more educated. might be fun to build one of those too
Link Posted: 10/26/2004 8:34:37 AM EST
Good thread...very informative. I love this site.
Link Posted: 10/26/2004 8:34:59 AM EST
My version of a Mod1 clone. Dated pic, as I changed the buttstock lately.

Link Posted: 10/26/2004 8:38:57 AM EST
Even more detailed information:

from MSTN forum in Industry Section
Link Posted: 10/26/2004 9:37:57 AM EST
i looked at the ops inc brake and it is stainless and polished how do you arrive at the dull black finish also still unsure about that collar piece on the barrel. what is the function of that
Link Posted: 10/26/2004 9:48:06 AM EST
[Last Edit: 10/26/2004 9:50:00 AM EST by mongo001]

Originally Posted By Mustang50:
i looked at the ops inc brake and it is stainless and polished how do you arrive at the dull black finish also still unsure about that collar piece on the barrel. what is the function of that



The Ops Inc supressor has internal threads that mate with the threads on the brake. The collar in the back centers up the supressor with the bore and, when the supressor is tightened onto the brake, it also puts a small amount of tension on the last few inches of the barrel, which, reportedly, makes the upper slightly more accurate.

Pics of a custom Ops Inc type FH I own and how it is constructed:


Link Posted: 10/26/2004 10:16:41 AM EST
ah i see !!!! again thanks for the good info
Link Posted: 10/26/2004 12:12:03 PM EST
Mongo,
That rifle looks great!

Would you recommend using a dedicated lower for an SPR?
I ask because I'd love to build a Mod1 style upper and be able to switch back & forth.

Would that work? or should it be treated as it's own thing...hence the S ?
Link Posted: 10/26/2004 12:43:51 PM EST

Originally Posted By GhostRing:
Mongo,
That rifle looks great!

Would you recommend using a dedicated lower for an SPR?
I ask because I'd love to build a Mod1 style upper and be able to switch back & forth.

Would that work? or should it be treated as it's own thing...hence the S ?



Mine has a dedicated lower with a JP trigger group. It's really just a target rifle, but pretty accurate for 18". I would say as long as you are swapping between dedicated long range uppers, one lower could serve for two or more uppers. That's how I did it for the last ten years. I had one pre-'94 lower with a bunch of "spare" uppers for that lower.
Link Posted: 10/26/2004 1:25:52 PM EST
Thanks for the info!

I think the "smartest" route for me is to eventually build a dedicated long range set-up.
The trigger group alone is probably best suited for this.

back to the checkbook!
Link Posted: 10/26/2004 2:57:06 PM EST

Originally Posted By GhostRing:
back to the checkbook!



I find the credit card much easier to use.
Link Posted: 10/27/2004 3:38:08 PM EST
[Last Edit: 10/27/2004 3:39:42 PM EST by M4-TUNA]
SPR means Special Purpose Rifle like a sniper rifle it is a SPR the term has been used for a long time go Goggle SPR and you wil see some old rifles using SPR. It is like SPS Special Purpose Shotgun like Remington uses(11-87 SPS)My Bushmaster is called a SPRMINTER it is have SPR and have Varmit gun LOL
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