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8/31/2026 9:58:00 PM EDT
Stupid question, but humor me and I appreciate any guidance.

I bought a Knightstick from Operation Parts. These are listed as being used for the SR15 and SR25. When I insert it into my APC upper, it doesn’t seem like it fully seats into the locking lug recesses and there is some rotational play. Is this normal?
8/31/2026 10:14:05 PM EDT
[#1]
Does the APC barrel extension have rounded lugs like the Knights ones?
If not, probably not a good idea.
8/31/2026 10:31:44 PM EDT
[#2]
Quote History
Originally Posted By Nobody69s:
Does the APC barrel extension have rounded lugs like the Knights ones?
If not, probably not a good idea.
View Quote


It’s a KAC SR25 APC.
9/1/2026 11:33:12 AM EDT
[#3]
Yes sir that is normal.

You're good to go. Please remember the KAC Knightstick is really only for MD swaps and removal of the Mod 2 castle nut.

www.presampledepot.com
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KAC Dealer | Armorers | 07/02
9/1/2026 3:35:22 PM EDT
[#4]
Quote History
Originally Posted By EnablerNo1:


It's a KAC SR25 APC.
View Quote
Oh ha!
Excuse my ignorance on this.
9/1/2026 8:33:53 PM EDT
[#5]
Quote History
Originally Posted By PresampleDepot:
Yes sir that is normal.

You're good to go. Please remember the KAC Knightstick is really only for MD swaps and removal of the Mod 2 castle nut.

View Quote


Great, thank you!

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