Tom609 27 Posted October 20, 2013 This would be my first update on a stock Sport. Has anyone done this with their Sport? Do I need any special tools? Would I be able to use the existing buffer, etc? If there are any links you could recommend I'd appreciate it. Thanks! Quote Share this post Link to post Share on other sites
iCARRY 0 Posted October 20, 2013 Not 100% on this but I believe S&W used a longer than normal buffer tube on the nj compliant models. If they did, you are going to have to replace the buffer tube. Quote Share this post Link to post Share on other sites
M1152 713 Posted October 20, 2013 I did one here it’s kind of a hack job but so far I like it, I could always change it. If you scroll down to #1464 you will see what I mean. You may be interested in this kit I just ordered it for my own build to replace the ACE Skeleton stock. There turned out to be an issue on the ACE where the plastic bushing in the rubber extension cracked, that’s not good Quote Share this post Link to post Share on other sites
buell508 6 Posted October 20, 2013 The sport has a one piece buffer tube - stock, it only looks adjustable, you will need a new buffertube.. Quote Share this post Link to post Share on other sites
Tom609 27 Posted October 20, 2013 Thanks for the quick replies. The one at Brownells looks like it would do the trick. 89 doesn't sound bad for the whole kit. I'll have to check YouTube for visuals on how to do it. Thanks again. Quote Share this post Link to post Share on other sites
buell508 6 Posted October 20, 2013 I'm thinking about the kit as well looks good for $89 Quote Share this post Link to post Share on other sites
buell508 6 Posted October 20, 2013 Any one know of any issues using a rifle buffer,tube,and spring in a carbine? Quote Share this post Link to post Share on other sites
iCARRY 0 Posted October 20, 2013 Any one know of any issues using a rifle buffer,tube,and spring in a carbine?Why would you do that? Quote Share this post Link to post Share on other sites
T Bill 649 Posted October 20, 2013 There are differences between carbine length and rifle length stock hardware mounted on the lower receiver. However, this has no reflection on the type of upper mounted on the lower. Carbine uppers can be mounted on a lower receiver with a rifle stock setup. There are a few exceptions but as a rule any upper can be mounted on any lower. Quote Share this post Link to post Share on other sites
Maksim 1,504 Posted October 20, 2013 Check out DSG arms. They usually have them in kits. Also aim surplus if you want to piecemeal it. Quote Share this post Link to post Share on other sites
M1152 713 Posted October 20, 2013 There are differences between carbine length and rifle length stock hardware mounted on the lower receiver. However, this has no reflection on the type of upper mounted on the lower. Carbine uppers can be mounted on a lower receiver with a rifle stock setup. There are a few exceptions but as a rule any upper can be mounted on any lower. Thanks for clearly that up, I thought that was the case otherwise it would be going back. The way I understand it is you are OK as long as you NEVER mix the buffers & tubes, in other words never put a carbine buffer in a rifle tube and vice versa Quote Share this post Link to post Share on other sites
Maksim 1,504 Posted October 20, 2013 I honestly dont know about that. You should be able to use a carbine buffer in a full sized tube, but not a rifle buffer in a carbine tube, due to size. But I am by all means, not an AR expert. I typically use rifle buffers and tubes on mine. Quote Share this post Link to post Share on other sites
iCARRY 0 Posted October 20, 2013 If you use a rifle buffer tube you can not use the magpul carbine fixed stock unless you drill a hole into the buffer tube and basically pin the stock at whatever length you want. At that point you might as well as just re-pin your current stock. Quote Share this post Link to post Share on other sites
M1152 713 Posted October 20, 2013 But I am by all means, not an AR expert. I typically use rifle buffers and tubes on mine. Nor am I but a quick search revealed this .... Quote Share this post Link to post Share on other sites
Maksim 1,504 Posted October 20, 2013 Makes sense. Quote Share this post Link to post Share on other sites
iCARRY 0 Posted October 20, 2013 Please disregard everything I posted in this thread. My eyes and brain were not working together. Just noticed you are talking about the fixed rifle stock not the fixed carbine stock. Sorry. I feel like an idiot. Quote Share this post Link to post Share on other sites
Barms 98 Posted October 20, 2013 Check out DSG arms. They usually have them in kits. Also aim surplus if you want to piecemeal it. the DSG arms buffer tube kit plus a magpul stock is an insane deal. I don't know how they do it.. HOWEVER, they do not offer the new FIXED stock in a package which extremely bummed me out.. Quote Share this post Link to post Share on other sites
carl_g 568 Posted October 21, 2013 PSA also has a complete mil spec MOE stock kit for $69. I got this, an Aimpoint PRO and flip up sights and the shipping was 7 bucks. Quote Share this post Link to post Share on other sites
Garda 0 Posted October 22, 2013 I have one on my colt mt6400. Needed a new buffer tube to put it on. I really like it. Quote Share this post Link to post Share on other sites
Tom609 27 Posted October 22, 2013 Thanks for all the suggestions. I ended up ordering the stock and kit from Brownells as Mosin Fan suggested. I checked out youtube and it doesn't seem too difficult to swap them out. I'll check back if I have any problems, but hopefully I'll have it installed and ready to try out this weekend. I appreciate all the help. Quote Share this post Link to post Share on other sites
CologneFF 0 Posted October 27, 2013 Hey guys, I am essentialy in the same spot, and as I review what knowledge you all put out I was wondering if anyone knows if I can use either the fixed moe carbine stock or the moe fixed rifle stock by just unpinning the one that came with the sport or if it's absolutely necessary to change the tube no matter what. Im super anxious about messing with the tube as so many ppl report difficult times using the tools available with m&p models not working with castle nut. Thanks Quote Share this post Link to post Share on other sites
CologneFF 0 Posted October 27, 2013 Just wanted to add, it looks like the link to the kit mosin fan posted, the tube is completely round.. as in no square part on bottom for those states where you can adjust your stock.. may be this means the moe fixed rifle will not work with original sport tube? Quote Share this post Link to post Share on other sites
JackDaWack 2,894 Posted October 27, 2013 The rifle stock requires a rifle buffer tube, the carbine stock requires a carbine buffer tube. Rifle stocks do not adjust, so there are no adjustment notches on the tube... they also don't have a castle nut since the whole stock tightens to the receiver. The carbine fixed stock uses a carbine tube, so it is a hybrid between a fixed and adjustable stock. Quote Share this post Link to post Share on other sites
Tom609 27 Posted October 27, 2013 Yes, as Jack said. The new buffer tube is significantly longer than the stock one. You definitely can't use the same one. It looks like the Magpul should easily go on, but I'm hung up getting the old stock one off. The castle nut is staked and I don't have an AR tool. Since I won't be using the old stock, will I need to worry about buggering up the Castle nut using regular tools? When doing a search, there is also mention that you have to drill out and unpin the fixed stock to get it off. It would seem that once I get the nut off the whole thing should unscrew from the receiver, shouldn't it? Quote Share this post Link to post Share on other sites
JackDaWack 2,894 Posted October 27, 2013 yes, once the castle nut is loose you can begin to unscrew the tube. Just make sure the detent spring for the buffer doesnt go flying.. Typically a solid flat head screw driver and a hammer can get the job done, but it is a less than ideal method and you have to be very careful.. You do need to find a way to secure the lower receiver in a vice or something.. that alone makes the job 90% easier. Quote Share this post Link to post Share on other sites
Tom609 27 Posted October 28, 2013 Thanks, Jack. Quote Share this post Link to post Share on other sites
T Bill 649 Posted October 28, 2013 If you have never taken a tube off of a lower receiver then it is important to remember to be careful to make sure you do not loose the buffer retainer and buffer retainer spring held in place by the tube and the take down pin and take down pin spring located under the plate the castle nut is holding to the back of the receiver. You Tube is your friend here. Quote Share this post Link to post Share on other sites
Tom609 27 Posted October 28, 2013 Yes, I've looked at what's available on Youtube. Good tip. Thanks. Quote Share this post Link to post Share on other sites
Tom609 27 Posted November 8, 2013 I successfully completed the change today. There was no way I was getting that castle nut off without an AR stock wrench and I picked one up on ebay for $7. The nut was pinned, but I used a small drill bit to remove some of the punch and the wrench did the rest. From that point on it took 2 minutes to make the changeover. It has a much more comfortable cheek weld and I can't wait to check it out this weekend. Thanks again for all the help. Quote Share this post Link to post Share on other sites