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Thread: SR-25 EM Carbine History

  1. #1
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    SR-25 EM Carbine History

    Shortly after 9/11 elements operating in Afghanistan noted that the M4A1 even with our (KAC) MRE FF RAS, and S&B Short Dot was not up to the task of going from the CQB fight to the edge of the villages or out in the mountains, and while the 18" Mk12 Mod0 and Mod1 are capable in the accuracy department, that they where neither very handy for CQB, nor would 5.56mm, even with then newly adopted 77gr AA53 round (Mk262) capable of barrier penetration at range. Larry Vickers did a segment on Tactical Arms to air this year where he talks about why the M4 was picked over the MP-5 for CQB, as to somewhat paraphrase him “ you sometimes need to step out of the house and make a 100m or 200m shot”, he then relates to the 7.62mm SR-25 EM Carbine, and the 7.62 Battle Rifles, “well in Afghanistan, sometime you need to step out or go up on a building an make a 400-600m shot, and 5.56mm is not ideal for that”.



    We had built pre-ban SR-25K 16" guns, and some other 7.62 carbines, however they where not really designed for the “M4 type” roles that where being envisioned.



    We came up with the SR-25 14.5" Battle Rifle,



    With the idea is that it was very similar in appearance to the M4's and not going to draw undue attention, as well unlike the majority of systems, it used the same manual of Arms as the M4/M16, so soldier who have years on the M16FOW, don't have issues relearning drills, especially valuable under stress.



    7.62mm is more optimized in longer than 14.5” barrels and really wants at least a 16" barrel, and a lot of concerns about the reliability of the 14.5" gun were being given, so shortly after the 16" SR-25 Battle Rifle was developed, which was really just a longer barrel.






    We had never envisioned a 7.62mm gun being run like an M4, and especially with a suppressor neither the 14.5 nor the 16" gun where at the reliability level that was desired.


    Especially suppressed, I ran the 16" SR-25BR at classes, and demos.




    Accuracy even with the chromed barrel was always good, sub-MOA and a fair amount under the 1/2MOA mark.

    It is a good gun, but in high suppressed round counts it got dirty and finicky.







    Near the first quarter of '09 we started work on a PIP of the 16" gun, as well as the 20” M110.

    High-speed video, lots of rounds, more high-speed video, changes to the gas system, and more rounds and video, a lot more stuff and changes to the bolt carrier, the recoil system resulted in the SR-25 EM Carbine.



    At the same time, the optical industry was busy working on a 1.1-8x scope to give the user the ability to take advantage of the added capabilities of the 7.62 round.






    What we ended up with was in our opinion the finest 16" 7.62mm gas gun on the planet.



    We shot several EM’s for over 1,000 rds fully suppressed with no additional lube, with no stoppages

    We have done extensive lifecycle work on the guns, endurance testing etc.



    We wanted to build the best gun we could, so if someone on a mountain top in Afghanistan or wherever else needed to have a gun that would go and go and go, it would.

    If he has to dump it in snow to cool it down, it would go and go and go.



    With well over 50,000 rounds thru it, including a day where Mr. Knight and I stood in a puddle of muddy water splashing the gun to cool, we feel we are there.



    Unlike our previous carbines, which we showed at SHOT (I have a pic somewhere of me holding the 14.5" gun at SHOT'04 when I was still in the Canadian Army) and never really publicly released for sale, we wanted a short 7.62 like this this gun to be our Flagship.



    So its here, and available.
    Kevin S. Boland
    Manager, Federal Sales
    FN America, LLC
    Office: 703.288.3500 x181 | Mobile: 407-451-4544 | Fax: 703.288.4505
    www.fnhusa.com

  2. #2
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    It's probably available elsewhere, but can you give the particulars of the carbine?

    Rail? Gas length? Materials? Barrel twist? Barrel maker? Anodizing? Trigger/FCG? BUIS? Optic mount? Suppressor models directly compatible? Etc?

    Thanks!
    Last edited by SHIVAN; 05-13-10 at 13:03.
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    Sorry

    Barrel is 1:11 twist Chromoly Steel Chrome Lined
    Most barrels are Obermeyer, however Krieger and our own in house barrels are also being used.

    Gas System - M16 Rifle Length

    Rail - Rifle Length Black M110 URX, with Integral Front Sight

    Anodizing - Black Milspec TypeIIIA HCA

    Trigger - KAC 2 Stage Match

    BIS - KAC 2-600m P/N 98474

    Optic Mount - KAC 34MM

    Suppressors compatability
    KAC EM Carbine Suppressor (M110/Mk11 style)
    Surefire 762K (with SF specific 762FH)
    AAC 762-SD (with AAC specific FH)

    Those are the only ones I am aware of longer term testing with.
    Kevin S. Boland
    Manager, Federal Sales
    FN America, LLC
    Office: 703.288.3500 x181 | Mobile: 407-451-4544 | Fax: 703.288.4505
    www.fnhusa.com

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    Quote Originally Posted by KevinB View Post
    Gas System - M16 Rifle Length
    Do standard M16 rifle length gas tubes work with it?

    Dont think gas tube would ever be an issue, just wondering.


    Again, great post thanks for the info. More pics of the earlier guns and prototypes would be cool too!

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    Kevin,

    Was there a reason KAC opted against extended feed ramps in the EMC? Thanks.
    Scout Rider for the Mongol Hordes

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    I am going to get with III and make a better pictorial.

    Yes a standard M16 gas tube will work, but I strongly beleive the barrel will be cooked long before the tube goes.

    We did not see any issues with feeding - so ramps where not on the agenda, they may be brought in sometime in the future though.

    The biggest improvements to this gun where on the extraction and ejection side of the house.
    Kevin S. Boland
    Manager, Federal Sales
    FN America, LLC
    Office: 703.288.3500 x181 | Mobile: 407-451-4544 | Fax: 703.288.4505
    www.fnhusa.com

  7. #7
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    Quote Originally Posted by caporider View Post
    Kevin,

    Was there a reason KAC opted against extended feed ramps in the EMC? Thanks.
    From what I've *heard* it actually can decrease accuracy by deforming the tip of the bullet. LMT however uses it in their 7.62 MRPs.
    Last edited by Titleist; 05-13-10 at 13:54.
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  8. #8
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    Great info on the SR25 Kevin. I want one!
    Chief Armorer for Elite Shooting Sports in Manassas VA
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    Quote Originally Posted by Titleist View Post
    From what I've *heard* it actually can decrease accuracy by deforming the tip of the bullet. LMT however uses it in their 7.62 MRPs.
    As does LaRue in their OBR.

    I agree that extended ramps do require a high degree of barrel extension to upper receiver fitting to avoid the "lip" that can catch bullet tips.
    Scout Rider for the Mongol Hordes

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    Love the write up! Good read.
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