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+--- Thread: Grendel upper on Springfield Saint lower. (/showthread.php?tid=17323)
Grendel upper on Springfield Saint lower. - 92vanguard - 10-28-2018
My first Grendel. The Springfield 5.56 upper is a mid length gas system. The new 6.5G upper is rifle length gas system. Any chance I might have cycling issues with the original heavy buffer in the Springield lower?
Grendel upper on Springfield Saint lower. - Sticks - 10-28-2018
Welcome to the Horde.
You should be fine if it's a standard rifle length buffer. Who made the Grendel upper?
Grendel upper on Springfield Saint lower. - 92vanguard - 10-29-2018
Bca.
Grendel upper on Springfield Saint lower. - Sticks - 10-29-2018
Of all the issues I have heard of with BCA, gas ports were not one of them. You should be GTG. Do a test fit with the ammo though. You should be able to drop a round in the chamber, turn the rifle barrel up and the round should fall out, or a light tap to drop the round.
Next is chamber a round in the upper only, push the bolt in to battery and it should extract easy and not leave any marks on the bullet aside from a couple of longitudinal scratches from the lugs. Making sure it (bullet) does not get jammed into the lands.
Grendel upper on Springfield Saint lower. - ported45 - 10-29-2018
Wish you good luck!
Grendel upper on Springfield Saint lower. - 92vanguard - 10-30-2018
Thanks!