Chief Rick Posted February 23 Posted February 23 I have a fiberglass stock (Graeboe Ridgeback) that I want to put a bag rider on. Problem is, there's no picatinny rail on the bottom of the buttstock. Was thinking of drilling a hole and using epoxy for a nutsert or similar in order to attach a short piece of picatinny.. Looking for recommendations on accomplishing this. Quote
Sedalia Dave Posted February 23 Posted February 23 (edited) Use AcraGlass. It's specifically made for gunstocks. Brownells carries it. Quote In addition to being a specially formulated, powerful bedding epoxy, ACRAGLAS is also a superb glue for attaching metal to wood or fiberglass. https://feeds.brownells.com/userdocs/learn/Inst-586 Acraglas.pdf#:~:text=In addition to being a,Release Agent selectively lets ACRAGLAS Edited February 23 by Sedalia Dave 1 Quote
Chief Rick Posted February 23 Author Posted February 23 (edited) 36 minutes ago, Sedalia Dave said: Use AcraGlass. It's specifically made for gunstocks. Brownells carries it. https://feeds.brownells.com/userdocs/learn/Inst-586 Acraglas.pdf#:~:text=In addition to being a,Release Agent selectively lets ACRAGLAS You mean instead of 2-part epoxy? I had a though of cutting the ends off a couple of older arrows I have and epoxying them into the stock. I believe the inserts on the arrows are threaded 8-32. Thoughts? Or should I use a 1/2" long, 10-24 threaded insert? I don't think I trust a rivnut. I don't know how thick or strong the fiberglass is. Edited February 23 by Chief Rick Quote
Colorado Coffinmaker Posted February 23 Posted February 23 My suggestion would be to drill for the threaded insert. Insert it to 'cut' threads. Take it back out, coat the cut threads in the stock with Acraglas then re-install the threaded insert. Then cross your fingers it was good fiberglass to start with. 2 Quote
Sedalia Dave Posted February 23 Posted February 23 (edited) 9 hours ago, Chief Rick said: You mean instead of 2-part epoxy? I had a though of cutting the ends off a couple of older arrows I have and epoxying them into the stock. I believe the inserts on the arrows are threaded 8-32. Thoughts? Or should I use a 1/2" long, 10-24 threaded insert? I don't think I trust a rivnut. I don't know how thick or strong the fiberglass is. Acraglas is a two part epoxy. It is specifically designed for use on wood and synthetic gun stocks. Unlike regular epoxy it is formulated to stand up the stresses from recoil. A bag rider isn't going to put much stress on the stock but I would still use Acraglas. There are two formulations the regular which is quite thin and is used to repair cracks and a Gel version that is a lot thicker. I would buy a new insert instead. You can buy them at any archery shop. Edited February 23 by Sedalia Dave 2 Quote
Sedalia Dave Posted February 23 Posted February 23 the 9 hours ago, Chief Rick said: I don't think I trust a rivnut. I don't know how thick or strong the fiberglass is. 37 minutes ago, Colorado Coffinmaker said: My suggestion would be to drill for the threaded insert. Insert it to 'cut' threads. Take it back out, coat the cut threads in the stock with Acraglas then re-install the threaded insert. Then cross your fingers it was good fiberglass to start with. I would not use any insert that cut threads. Too great a chance of damaging the stock. Especially as thin as that area of the stock is. Drill a hole as close to the diameter of the insert as possible but not so small that the insert has to be driven in. Coat the insert with Acraglas that when you push it into the hole some squeezes out. Clean the excess and it'll like this it was done at the factory. 2 Quote
Pat Riot Posted February 23 Posted February 23 Am I the only one that had to look up “bag rider”? Personally I would go with the idea proposed by @Colorado Coffinmaker Also, make sure you limit the glue near the bottom of the nutsert hole so it doesn’t interfere with the internal threads. 3 Quote
Stump Water Posted February 23 Posted February 23 1 hour ago, Eyesa Horg said: Yes, I had to look it up too! Likewise. Quote Based on the development of equipment in the sport, rear bag riders became commonly utilized and accepted in the Precision Rifle Series (PRS) around 2015–2017, coinciding with the rise of specialized chassis systems and the need for better recoil management in positional shooting. Initial Adoption (c. 2015–2016): Dave Preston, the 2015 PRS Series Champion, is often credited with helping design one of the early, popular bag riders for the MasterPiece Arms (MPA) chassis to improve recoil management. Rise in Popularity (2017–2018): As chassis systems (like MPA and XLR) became standard, and as the "Gas Gun Series" launched in 2017, the use of flat-bottomed bag riders to mimic traditional stock interfaces for better tracking grew rapidly. Adjustable Bag Riders (2018-2020): The introduction of specifically designed "Adjustable Bag Riders" (ABR) by Long Shot Precision further popularized their use to achieve greater precision and stability at the rear of the rifle, particularly for those using Magpul PRS stocks. While some purists prefer using only a standard rear bag, bag riders are widely used in modern PRS, allowing for more consistent, "stick-free" movement on the bag, especially for elevation adjustments. So you build your PRS gun with one of the chassis style "stocks". Then you have to get this bag rider so the butt of it will "interface" with the rear bag like a regular ol' rifle stock. Ok. Quote
PowderRiverCowboy Posted February 23 Posted February 23 How much torque do you need? If not Much a simple Helicoil kit and epoxy or Fiberglass epoxy if you have it 1 Quote
Chief Rick Posted February 23 Author Posted February 23 54 minutes ago, Stump Water said: Likewise. So you build your PRS gun with one of the chassis style "stocks". Then you have to get this bag rider so the butt of it will "interface" with the rear bag like a regular ol' rifle stock. Ok. Well, I'm not shooting PRS and never have. I read the quote above but I don't see how a bag rider will aid positional shooting in PRS. In my limited experience, these work best from a bench or prone. For me, this is for a bench gun - specifically for 22LR Long Gong matches. It's been driving me crazy that almost all fiberglass stocks come with a cut out under the stock these days (hand-grab/butt hook - I don't know what it's called). And on top of that, most of these don't have an easy way of attaching pic rail or a bag rider directly. 34 minutes ago, PowderRiverCowboy said: How much torque do you need? If not Much a simple Helicoil kit and epoxy or Fiberglass epoxy if you have it I would not think much. The rifle is heavy but it's going to to be shot from a bench and is chambered in 22LR. 1 Quote
Stump Water Posted February 23 Posted February 23 4 minutes ago, Chief Rick said: Well, I'm not shooting PRS and never have. I read the quote above but I don't see how a bag rider will aid positional shooting in PRS. Yeah, I'm a bit puzzled too. Of course I don't shoot PRS either. I'd like to see the finished result when you get 'er done. 🙂 1 Quote
PowderRiverCowboy Posted February 23 Posted February 23 8 minutes ago, Chief Rick said: Well, I'm not shooting PRS and never have. I read the quote above but I don't see how a bag rider will aid positional shooting in PRS. In my limited experience, these work best from a bench or prone. For me, this is for a bench gun - specifically for 22LR Long Gong matches. It's been driving me crazy that almost all fiberglass stocks come with a cut out under the stock these days (hand-grab/butt hook - I don't know what it's called). And on top of that, most of these don't have an easy way of attaching pic rail or a bag rider directly. I would not think much. The rifle is heavy but it's going to to be shot from a bench and is chambered in 22LR. I personally would just find a 1/4 in Helicoil kit and get it done:) https://www.amazon.com/CENFORGE-4-20-Inch-Helicoil-Rethreading/dp/B0DQPK8731/ref=sr_1_2_sspa?adgrpid=185696092025&dib=eyJ2IjoiMSJ9.bHYmI4QYbW2_kBBktbshp0KaJmQYBS0KpHg5h3spaXpFByXRluDymwwxVPZb5ps4a5JywvbY6KZATnsaTb0OOJmYowvHBxt3edEl-28KNd-0xdbPsl5jj0kdueZN6QIDMX4cu6G5yLcvHwL_SpIzZehVWninY0A75U7K5B8LyDrV1-1CdA_JIMMus7WPvjRM-ElVhfzYy-LhzTX7t_QGTLE3fXfcL1Xgzg9B76hgim4.--DIAF4GoM0inoGvUcCax6sh7Xx-965aHHNeQWOK2dI&dib_tag=se&hvadid=792689467893&hvdev=c&hvexpln=0&hvlocphy=1025846&hvnetw=g&hvocijid=14585592417789996144--&hvqmt=e&hvrand=14585592417789996144&hvtargid=kwd-410198489400&hydadcr=6831_13571482_2420695&keywords=1%2F4%2Bhelicoil%2Bkit&mcid=816401a27f3536dfa481d48bae19d740&qid=1771871957&sr=8-2-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1 1 Quote
Chief Rick Posted February 23 Author Posted February 23 54 minutes ago, Stump Water said: Yeah, I'm a bit puzzled too. Of course I don't shoot PRS either. I'd like to see the finished result when you get 'er done. 🙂 I'm putting this project on hold for now. I'm working on a trade for a chassis that already has a bag rider. Gentleman is willing to trade straight for a scope that I happen to have that I just took off another rifle. I prefer the look of a traditional stock over a chassis and the feel of fiberglass over aluminum, but... This is what's currently on the rifle (only in green): This is what I'm now planning to put on the rifle: 2 Quote
watab kid Posted February 24 Posted February 24 what an interesting choice , im not against either but i do prefer the first to the second in general my prefernces have no bearing tho its got to be what you like in the end Quote
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