What did you do for your buffer system?Damn things sure are fun. Like having an SBR to play with but no year waiting for the damn OK and stupid stamp. The SB4 Brace is really nice too. Glad I went ahead and spent the money for it, very well made. I foresee a folding adapter from Santa for me
Same one that came with the Rifle kit I bought from 5D. I used the same lower I made, just took the stock and buffer tube off, the SD4 Brace came with a tube already on so just put the same set up into it. Seems to be working great. Empties are coming out very clean. So clean they look almost like the empties form my pistols. Going to need to order another one now so I can have both set up to go. UPS just dropped off 3 more lowers today !
I was wondering about buffer weight and stuff. I ordered a dirty bird ar9 buffer. Its has an 8oz buffer, not sure what kind of spring. It also has a 6 position milspec buffer tube so I'm hoping there is an easy way to switch my sba3 back and forth off my other pistolSame one that came with the Rifle kit I bought from 5D. I used the same lower I made, just took the stock and buffer tube off, the SD4 Brace came with a tube already on so just put the same set up into it. Seems to be working great. Empties are coming out very clean. So clean they look almost like the empties form my pistols. Going to need to order another one now so I can have both set up to go. UPS just dropped off 3 more lowers today !
I looked up how to remove the sba3 brace from the buffer tube. I haven't tried it yet but it sounds like you pull downwards on the lever and it pulls right off. Maybe it's the same for sba4.
I was trying to get it the same way the M4 Stock worked and it's different. Lifted up like you said and it comes right off. Comparing the tube with the one from the Rifle and they are exactly the same size.
Nice. Glad it worked.Well, damn that was easy now
No its a lower that was an 80% from 5D. When I bought the jig I also bought a complete "kit", lower, lower kit from CMMG, rifle upper assembled, and M4 stock. Later I bought the FM upper and SD4 Brace from Primary. Bolted the FM upper and the brace on the lower I had already made. I just got a few more lowers in. Need to get one more finished so I will have the rifle and pistol at the same time.
Got it, thanks for your help. Good tip on the pins!One thing I did change is the take down pins. Tried one by KNS that has a push button release. Liked it so much I bought several more. With those you don't have to use the detent's in your lower. this was one of the main things the instructions warned about. Loosing them while trying to build a lower. The pins are $18 a piece so pricey but, I liked the idea so much I am sold on them. It was a lot of fun building it and a ton of fun shooting it
Primary is impressive with how fast they get stuff out. When I tried them I saw them advertising it but figured, sure. They were not blowing smoke, they are almost on Amazon kind of speed
I'm going to do half hash mark passes as well because my lowers are 7075 aluminum. I'm going to start in the morning when the family is all sleeping. Tried to start tonight but too many distractions so I gave up.Primary is impressive with how fast they get stuff out. When I tried them I saw them advertising it but figured, sure. They were not blowing smoke, they are almost on Amazon kind of speed
When I got my Jig it did have the added advantage of getting me to finally build a new bench for me. When we moved over a year ago I had some of the stuff. Every time I had a long weekend It was on the to do list and then I would not. I finally built it for that project and of course ever since use it daily. Wondering why I took so damn long to make another one
When I did my lower I did 1/2 depth passes each step since I was just sure I would screw up a $150 lower but it was amazingly easy with the jig. Have fun with it!!
It makes a lot of noise, family may not be friendly to the idea while sleeping
5D sells an endmill for this that threads to the router. They have them for many routers. I figured it was worth buying one since that is the other place some have had the same problem. Collet letting bit slip. When I did mine I drilled the holes last only because that was how they said to do it. Not sure it would matter if done first.
It can be done either way but I would prefer to drill the holes second to avoid the interrupted cut you'd get passing through the holes. Especially if you're using a router instead of a mill. You'll get a burr in the pocket if you drill last and in the hole if you mill last. With sharp tools, the burr is a minor consideration.
