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Thread Size on 6.5" SDP Barrel???

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Solscud007
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Thread Size on 6.5" SDP Barrel??? Empty Thread Size on 6.5" SDP Barrel???

Post by MadDogDan Sat Mar 30, 2013 10:32 pm

I just purchased an SDP with 6.5" threaded barrel off Gun Broker. I do not have it yet but want to get what I need to run my AAC TiRant Suppressor on it. The current piston in my TiRant is American thread (for my FNP45 Tactical) and I know the Kriss barrel is M16x1 threads but what I don't know is, are they right or left hand threads. AAC makes both M16x1R and M16x1L pistons. Just need to know which one I should order. Of course as soon as I have this little puppy in my hands I am going to send in my Form1 to SBR it. I have been telling myself I don't need any more NFA items (already have SBR's, SBS's, Suppressors, and one 40mm DD) but no collection would be complete without a 45ACP SBR to go along with my suppressed side arms.

Any help would be greatly appreciated,
MadDog partytime

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Post by Solscud007 Sat Mar 30, 2013 10:41 pm

Hmm us carbine folk don't know. Catmostfeared, what is the answer?
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Post by mambro Sat Mar 30, 2013 11:44 pm

Hello and welcome to the forum! It's M16x1 LH barrel threads Smile

welcome2
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Post by MadDogDan Sun Mar 31, 2013 12:36 am

Thanks, will order the piston now from AAC. I already have a Surefire E1 series light with a Cree5 bezel that puts out 200 lumens that I usually have one me 24/7. I am going to sacrifice it to my Kriss (just ordered the adapter). I will just have to carry my larger G2 with Cree bezel that puts out 600 lumens.

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Post by CatMostFeared Tue Apr 02, 2013 3:14 am

mambro wrote:Hello and welcome to the forum! It's M16x1 LH barrel threads Smile

welcome2

beat me to and yup its Left hand thread

and there is a flash hider for it
http://www.hkparts.net/shop/pc/45-Pistol-Flash-Hider-4-Prong-212p1017.htm
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Post by Jedi380 Tue Apr 02, 2013 8:52 am

^ I'm considering this flash hider too... can't say I've seen much flash to hide yet, but I've only used one brand of ammo in it so far...
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Post by MadDogDan Tue Apr 02, 2013 3:17 pm

Flash hiders like the Smith Vortex and the HK one you posted do an excellent job. I may pick one up for those time I do not shoot my Kriss suppressed.

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Post by beltfed Wed May 08, 2013 11:11 pm

For not much more than the cost of a new piston you can rethread your barrel to .578 like your fnp is. I have a tirant and an fnp also. That's what I did. I've got a thread on the conversion round here somewhere.....

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Post by beltfed Wed May 08, 2013 11:15 pm

http://www.krisstalk.com/t205-rethreading-the-sdp-barrel-with-pics

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