survivalshop Posted March 26, 2016 Report Share Posted March 26, 2016 I looked at my 308AR rifle stock Buffer Springs to see what coil count & Spring length they were to see how they compared to what a Member KnewB had in his rifle & I find that the New 18" build has a strange spring in it , well not so strange , its an AR 15 Rifle stock size , Buffer Spring , by length & Coil count . Now this Buffer Spring is in a New build as said , which I'm having strange issues in & if you go to 308, Parts & under D.Wilson Bolts , you will see what I'm talking about , Rifle functions flawlessly with all the other Bolts I have tried in it , but his & its not just one of his Bolts , its also a complete BCG , acting the same way , odd , for sure . So me installing a AR 15 Rifle Buffer Spring , which was ordered , not sure who yet but will find out because , I have no doubt I ordered the correct spring . The thing is , I took it for granted I got the correct spring & to be honest , I , until the other day didn't know what the spec's were for the correct 308AR rifle spring for a DPMS LR . MY Bad ! Now I know & I have uncovered , at least to me , some interesting measurements on the group of springs I have on hand . I will be installing the Tubb's Flat wire Buffer Spring I have in the 18" bbl'd rifle . I have a DPMS, 308AR Carbine Spring , the Spring that came out of the 18" Rifle & two AR 15 Rifle Stock Buffer Springs . Top to Bottom,- 308AR Rifle Buffer , DPMS (from my 18"Rifle ) - AR 15 Rifle Buffer ,- AR 15 , Rifle Stock Buffer Spring , Buffer Spring from my 18" Rifle , DPMS ,308AR Carbine Buffer Spring ( correct ) Measurements. DPMS Rifle Buffer - 5 1/4 " long AR 15 Rifle Buffer - 6 " AR 15 Rifle length Buffer Spring (# 1 ) - 12 3/8 " long , 43 Coils + ( # 2 ) 13 1/8 " long , 44 Coils . Spring from my 18" Rifle - 12 1/4" long , 43 Coils . We have plenty of Carbine info around here , so I will keep this just Rifle length stuff , but I will say that all the Springs had a Wire Diameter of 0.071" , Now, I know they can make Springs with different Tensions , but this measurement surprised me . CS ( Tubb's ) Flate Wire Buffer Spring ( Rifle or Carbine ) 18 5/8 " long , I didn't bother to count the Coils or their thickness , this Spring is a Bear to get in a Carbine , but not all that bad in a Rifle length Receiver Extension. We have seen others who had AR 15 Rifle Buffer Springs here before , I did' think I would be one , you can't take anything for granted with these builds . You are at the mercy or the Parts you are shipped I thought I was doing a good job weeding the incorrect ones out & this time I got bit for not knowing & checking the components out . Just so you know my old 20" 308AR with DPMS Lower , has the correct Rifle Buffer Spring , 12 1/2 " long , 39 Coils . Quote Link to comment Share on other sites More sharing options...
beantown Posted March 27, 2016 Report Share Posted March 27, 2016 Awesome info survivalshop! Quote Link to comment Share on other sites More sharing options...
wetncold Posted March 27, 2016 Report Share Posted March 27, 2016 I agree. I have the Tubbs spring in my carbine length rifle and I thought I was going to have to hire a crew to get it in. But once in, I love it. Quote Link to comment Share on other sites More sharing options...
washguy Posted March 27, 2016 Report Share Posted March 27, 2016 1 hour ago, wetncold said: I agree. I have the Tubbs spring in my carbine length rifle and I thought I was going to have to hire a crew to get it in. But once in, I love it. Wet...yeppers they work pretty darn well Wash Quote Link to comment Share on other sites More sharing options...
survivalshop Posted March 30, 2016 Author Report Share Posted March 30, 2016 The Tubbs spring worked well , my 155 gr. Hornady Amax loads were ejecting at one o'clock , but the rest just lobed into a neat pile about two foot away at three o'clock .Too bad the D.Wilson BCG started to have the same issues when warm . I gave a full account in the 308 Parts section , under D.Wilson Bolts Quote Link to comment Share on other sites More sharing options...
Toolndie7 Posted March 31, 2016 Report Share Posted March 31, 2016 Nice find. I think those two parts right there (along with gas block) are to an AR-type rifle as a 4-barrel carb and ignition timing are on an old small block lol Quote Link to comment Share on other sites More sharing options...
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