Grease Gunner Posted February 23, 2020 Report Share Posted February 23, 2020 (edited) Recently acquired a Savage Mfr 1928a1 serial 551,000 rangeIt seems to shoot faster than what i expected. I dont have a working timer so I cant time it, But it has what I think is a M1a1/M1 buffer system, correct?Would that buffer/spring combo make it run faster than a 28?should I change it to what a 28 should have? Edited February 23, 2020 by Grease Gunner Link to comment Share on other sites More sharing options...
StrangeRanger Posted February 23, 2020 Report Share Posted February 23, 2020 Don't know about the speed difference but the modern urethane replacement '28 buffers do a better job of impact absorption than the M1 style. Protect the old girl and put in the right parts. Link to comment Share on other sites More sharing options...
ppgcowboy Posted February 24, 2020 Report Share Posted February 24, 2020 Can you make a video or an audio recording of a 20 round dump and send it to me? Link to comment Share on other sites More sharing options...
inertord Posted February 24, 2020 Report Share Posted February 24, 2020 I would change it back to the correct 1928 assembly. This is what the buffer pilot should look like, make sure that you get USGI Part(s). Link to comment Share on other sites More sharing options...
Grease Gunner Posted February 24, 2020 Author Report Share Posted February 24, 2020 I would change it back to the correct 1928 assembly. This is what the buffer pilot should look like, make sure that you get USGI Part(s).i have those parts and will make the change. for buffers i have pk's-Thanks a lot,sir! Link to comment Share on other sites More sharing options...
giantpanda4 Posted February 24, 2020 Report Share Posted February 24, 2020 I do not have the parts here in front of me right now, but is the pilot hole in the rear of the receiver the same size for an M1 as a 1928? I think it is larger. Which means the hole would have to be enlarged in your 28 to make that set up work. I have seen another gun just like that, the pilot was actually tapered in front as well. I think someone was trying to make it easier to field strip the gun. However, I think at one time the gun I saw had a Speedbolt in it. Make sure you don't have that anymore! Can you measure the hole for the pilot and also post pics of all the rest of your current internals? Link to comment Share on other sites More sharing options...
Grease Gunner Posted February 24, 2020 Author Report Share Posted February 24, 2020 (edited) I changed my 28a1 back to the correct pilot and buffer and what i took out is something i have not seen beforethe pilot that was in the gun actually has an internal spring.I compressed it in the last picture years ago a company called sprinco made something similar for 1911 pistols where the recoil spring guide also compressedin addition to the recoil spring Giant Panda was right on!! i will take pics of the internals and measure the hole for the pilot Edited February 24, 2020 by Grease Gunner Link to comment Share on other sites More sharing options...
deerslayer Posted February 24, 2020 Report Share Posted February 24, 2020 I found one of those in a gun also. The extension seems like a good idea to keep the unsupported spring in place when the bolt is forward. Link to comment Share on other sites More sharing options...
timkel Posted February 24, 2020 Report Share Posted February 24, 2020 I changed my 28a1 back to the correct pilot and buffer and what i took out is something i have not seen beforethe pilot that was in the gun actually has an internal spring.I compressed it in the last picture years ago a company called sprinco made something similar for 1911 pistols where the recoil spring guide also compressedin addition to the recoil spring Giant Panda was right on!! i will take pics of the internals and measure the hole for the pilot"Gunmachines" made those spring loaded pilot rods. Link to comment Share on other sites More sharing options...
Grease Gunner Posted February 24, 2020 Author Report Share Posted February 24, 2020 timkel,Do those springloaded pilots work?does it change ROF or perceived recoil?Thanks Link to comment Share on other sites More sharing options...
TD. Posted February 24, 2020 Report Share Posted February 24, 2020 This buffer pilot assembly appears to be an old GUNMACHINES invention. My recommendation is not to use anything from this now defunct company, especially the SpeedBolt. Link to comment Share on other sites More sharing options...
timkel Posted February 24, 2020 Report Share Posted February 24, 2020 (edited) timkel,Do those springloaded pilots work?does it change ROF or perceived recoil?ThanksI don't think the spring loaded pilot by itself, had any effect on the ROF. I have an old catalog somewhere. I'll have to look it up. Edited February 24, 2020 by timkel Link to comment Share on other sites More sharing options...
Bridgeport28A1 Posted February 24, 2020 Report Share Posted February 24, 2020 With a Gunmachines spring loaded pilot installed. I would wonder if it was ever run for any period of time with a Gunmachines "speedbolt" installed? Link to comment Share on other sites More sharing options...
giantpanda4 Posted February 24, 2020 Report Share Posted February 24, 2020 Even with a GI bolt assembly, this pilot and buffer system made the gun I saw run pretty quick! No actual rate, but it was as fast as a 21. Again, check the pilot diameter between your Gunmachines pilot and the GI 28 pilot. You may need a special 1928 style one (IIRC, PK has made them...?) with a slightly larger end on it if they are not the same size. Otherwise it may be a bit sloppy. Link to comment Share on other sites More sharing options...
mohawk64 Posted February 24, 2020 Report Share Posted February 24, 2020 That buffer probably shortens the bolt travel. That's where the rate of fire goes up. Link to comment Share on other sites More sharing options...
deerslayer Posted February 25, 2020 Report Share Posted February 25, 2020 If you took apart the solid m1a1 buffer and removed the steel rivets then put a urethane piece inside it (without the rivets) it would have a nice buffer effect. Be easier to remove and install than the original. Link to comment Share on other sites More sharing options...
anjong-ni Posted February 25, 2020 Report Share Posted February 25, 2020 Mine, from a bucket-o-parts purchase....Phil Link to comment Share on other sites More sharing options...
Grease Gunner Posted February 25, 2020 Author Report Share Posted February 25, 2020 when spring tensions are increased ROF goes up so the effect that the gunmachines pilot would increase itI shot one mag thru it flawlessly but it seemed fast.if anyone wants my old gunmachines pilot, its free just pay the shipping. i have no use for it Link to comment Share on other sites More sharing options...
giantpanda4 Posted February 25, 2020 Report Share Posted February 25, 2020 PM sent. I'd like to have that for reference. Link to comment Share on other sites More sharing options...
Grease Gunner Posted February 25, 2020 Author Report Share Posted February 25, 2020 (edited) I measured my pilots. The one I am sending to guantpanda is 8.66mm where it goes thru the receiverthe one that i had in my parts bin is 8.76mm. .one tenth of a mm fatter in thousandths thats .04 of an inch. it wont matter!Correction, 4 / one thosandths .004 Edited February 26, 2020 by Grease Gunner Link to comment Share on other sites More sharing options...
laurencen Posted February 25, 2020 Report Share Posted February 25, 2020 by the numbers its 0.004" smaller, Link to comment Share on other sites More sharing options...
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