Friday, February 21, 2020

Can I convert a Sig P320 9mm to .45 ACP? YES. (video)

Q: Can I convert a Sig P320 9mm to .45 ACP?
A: Yes.



I've been looking for an answer to this, and finally found it - Apparently you can! At least, according to this video attached right here, requiring only a few minor, non-permanent modifications.

Summary:  The Sig P320 9/.357/.40 Fire Control Unit (FCU) are the same, utilizing the same internal components and polymer grip module.  Obviously the magazines, slides and barrels are different.

The .45 FCU is almost the same... to a degree.  According to users on the Sig forums, the ejector is shorter on the .45 ACP FCU and the slide catch is modified to accommodate the larger .45-specific magazine on the .45-only grip module.

There's videos and forum posts where .45-P320 owners adapt their calibers down to 9mm with success and 100% functionality, but until the above video there were no reports of the other way around.  It makes you wonder why Sig was hyping the modularity of the P320, only to come out with the .45 and completely create a disconnect in the whole cross-platform modularity thing.

The ejector geometry is different between the 9/357/40 and the 45, but apparently that has little to no affect in simply switching out the slide catch and then switching calibers between the two groups and back.  My guess it affects things in the long run, ie if you shoot 1000 rounds then maybe you'll get an increased chance of malfunction, or maybe the longer ejector causes wear on the 45 slide and the shorter ejector causes increased chance of ejection failure on the smaller calibers.

Or maybe Sig Sauer thinks people are generally stupid (which ain't wrong) and they don't want them switching out semi-critical internal parts and then blaming Sig when it doesn't function properly.

Further, it seems that Sig has abandoned their Sub-Compact line of grip modules as they seem to be sold out everywhere, for the most part.  I suspect they want people to buy their P365 models for conceal carry.  They've already abandoned the P250 and parts are scarce for those now.  Gotta wonder where the P320 will be in five years.  No one is making FCU parts or thirdparty slides as of now, so if Sig abandons the P320 FCU, and the source of sear groups and slides run dry, what will happen to all these 80% frames and the surplus of grip modules and PDW modules?  Yeah, I'm just ranting now.

Relevant Links:
P320 pistols and caliber comparison - As told by an awkward barefoot guy on his living room floor.

Sunday, February 9, 2020

Shot Show Rundown 2020 (from other people's blogs)

I'm really sick of hearing about Glocks and plain-jane AR15's.  So here are things that were covered at Shot Show 2020 event in Las Vegas, mostly from TFB, that I liked, that are NOT Glocks and regular AR15s (AKA Christmas Wishlist).  I never really liked Sig before, but I recently got to try a Sig P320 and now I'm sold on the P320 and the FCU system.  This Shotshow is definitely the year of the Sig FCU.

Flux MP17 Brace for SIG Pistols - New chassis or grip module, as Sig refers to them as.  Noticeably different is the extension that houses a collapsible arm brace.  Comes in two versions - a shoulder stocked version and a brace version.  The difference between the two is hilariously minimal.  Additional footage here.










 More 80% Sig frame inserts - Frame blanks for the P365 and also the P320 from JSDsupply.









Another AR10 12 gauge shotgun - Another AR10 in 12 gauge that can take 308 uppers.  But it's made in Wyoming instead of Turkey, so there's that.  There were a lot of comments about how buying those Turkish shotguns support terrorism/genocide.  Don't give a damn either way, to be honest.  More options, the better though.


Another PCC AR but in .45 - Bufferless.  I'm curious if it works with Brownell's BRN-180 lowers.
 






Strike Industries guns and accessories! - I guess I'm a sucker for anything by SI.  Their PDW brace looks to be overshadowed by the Flux system - because this one is clearly ugly.  The SI looks more cumbersome, yet more-sturdier than the Flux.
80% Glock 19 and more Chassis systems for pistols.












Tippman 9mm Gatling accessories - Neat.









MDP-9 PCC - Another goddamn PCC AR, but it's roller delayed so that makes it interesting.













Altor corp DEAR pistol - As long as it's not another Glock, 1911, AR or AK, it is interesting.  One commenter mentioned that if this isn't sold for less than $100 then what is the bloody point?  The DEAR gun and Liberator were constructed for dirt cheap and were intended to be air-dropped from planes, but if this is over $100 then it's a really dumb idea.  Either way, who is the target audience for this?  Maybe for dispatching farm animals and as a dedicated load chronographing gun?  I guess you can conceal carry your favorite rifle caliber as a single shot.  Odd but interesting.








Metal SIG frames - Why? Who knows.  Metal is good, though.


Nighthawk Drop-in Hammer/sear unit - Had an idea to use this in a polymer or 3d-printed 1911 frame in the way that the Sig P320 FCU is used, but I guess it would also need a section of metal rails.  This is actually available now at $300.  Seems kind of pricey for experimentation, but the true purpose was to remove fitment work when installing a hammer and sear.


















Sig P320 to P365 Adaptive Chassis - Makes a P320 use a thinner, single stack magazine magazine and thus have a slimmer profile.  More options, the better.  If it sells for less than $60 then that's a lot cheaper than buying a whole new Sig P365 for the same purpose of concealed carry.  I'm actually surprised that there aren't more magazine conversion options for the Sig P320 since one of the big selling points was that you would be able to switch Grip Modules to customize the gun the way you want.













Quick seventeen minute video from Demolition Ranch that summarized it best.

Wednesday, January 8, 2020

(links) Belt-fed 22s, AR hybrids, and 80 percent receivers

...And other cool gun stuff.  These are the things that I missed in the eight months I was in Africa in 2019.

1. Belt-Fed AR upper receiver in .22lr - LithocoreX
Saw this on Reddit - Apparently a company called LithocoreX has purchased the machinery and tooling for building a .22LR belt-fed upper receiver which was originally owned by the now defunct Lakeside Machining.  On sale for $1300.  Not a bad deal considering that the next cheapest belt fed is the 9mm AR Beltfed from Freedom Ordnance at $1600.

Problem is that there is not too many good things about the company itself.  From a thread Uzitalk:
This is probably another one of those branded technical packages that keeps getting bought and resold by smallish machine outfits trying to expand their production line. Essentially the leftover stock and tooling of other failed commercial ventures. The Calico properties have been in this boat for years. Just keeps getting passed around.
Lengthy discussion on AR15.com here.  Note the date, August, 2018.  Some members state they didn't receive the item until December, and some saying February, which isn't too unreasonable for a small gun company.  Apparently some are approaching a whole year of waiting.

Video of a LSM .22LR 1919 - Not quite the same gun, but made by the same people and uses the same belt-advance mechanism
Status Update - Current status of shop.  Seems like they're highly disorganized and haven't even bothered to update their status page in months.

2.  Bren-AR hybrid
WeaponsGuild user Mauser98 has created an upside down AR15.  Also known as the BRAR by the creator (BRen AR-15).  Basically an upside down AR15.   Consists of an upper receiver (formerly a lower), a middle receiver (formerly the upper), and a new lower receiver frame which houses the fire control group.  A top-mounted weapon would be great for mounting on an M2 tripod or vehicle mount since the magazine would be easily accessible and you would be able to place the gun pintle close to pistol grip.
3. Side-fed AR15 (Not an FG-42)
Keeping up with the World War 2 theme of weirdly-mounted magazines, user Skib on the the WeaponsGuild forums has created a side-fed AR15.  Unlike the previous Bren-AR, this does not use a fancy mill and instead is constructed using more primitive methods using hacksaws, a Dremel, hand files, and welding.  It is rather impressive work.

Also check out this video from ForgottenWeapons about a similar project created in the 80's of a side-fed AR15.

4.  80% Mossberg 500 Pump AR15 hybrid
https://logic80.com/product/cs1280preorder/ Kind of kicking myself for not snagging one when they were taking pre-orders, but now looking at the process of finishing these, it looks a bit complicated and machine-heavy in construction and Mossberg 500's aren't really something that's high on my priority list of guns that I want to own.

5. 80% Sig frames and inserts
I've seen several online stores selling an 80% Sig frame insert for Sig P-320s and also P-22X frames.  I am 100% unfamiliar with any Sig Sauer firearms, but the more options for the 80% market the better.  This insert is called the MUP-1 - Modular Universal Pistol.

Here's a really good tutorial for the MUP-1 frame-insert.  Seems a lot simpler compared to the 1911 or even the P-22X which requires all sorts of specific jigs, tools, and dies and hand-fitting - specifically frame-rail cutting of the 1911/P-22x which, to me, looks like a real pain-in-the-ass to do.


Also there is an AR-15-like weapon that utilizes a Sig Sauer pistol frame insert that is used as the fire control group, so all the more reason to go with the Sig P-320 kits.

6. 80% ASR HomerBuilder's Kit - 
These ASR 80% kits have been around a while, but the reason I avoided it all this time is because it requires threading a receiver tube to take a buffer tube.  I don't know about you, but threading a tube requires precision, and hand-threading a tube straight is difficult for the average garage work-shop.